Saturn moon Enceladus may have salty ocean

Thursday, June 23, 2011

NASA’s Cassini–Huygens spacecraft has discovered evidence for a large-scale saltwater reservoir beneath the icy crust of Saturn’s moon Enceladus. The data came from the spacecraft’s direct analysis of salt-rich ice grains close to the jets ejected from the moon. The study has been published in this week’s edition of the journal Nature.

Data from Cassini’s cosmic dust analyzer show the grains expelled from fissures, known as tiger stripes, are relatively small and usually low in salt far away from the moon. Closer to the moon’s surface, Cassini found that relatively large grains rich with sodium and potassium dominate the plumes. The salt-rich particles have an “ocean-like” composition and indicate that most, if not all, of the expelled ice and water vapor comes from the evaporation of liquid salt-water. When water freezes, the salt is squeezed out, leaving pure water ice behind.

Cassini’s ultraviolet imaging spectrograph also recently obtained complementary results that support the presence of a subsurface ocean. A team of Cassini researchers led by Candice Hansen of the Planetary Science Institute in Tucson, Arizona, measured gas shooting out of distinct jets originating in the moon’s south polar region at five to eight times the speed of sound, several times faster than previously measured. These observations of distinct jets, from a 2010 flyby, are consistent with results showing a difference in composition of ice grains close to the moon’s surface and those that made it out to the E ring, the outermost ring that gets its material primarily from Enceladean jets. If the plumes emanated from ice, they should have very little salt in them.

“There currently is no plausible way to produce a steady outflow of salt-rich grains from solid ice across all the tiger stripes other than salt water under Enceladus’s icy surface,” said Frank Postberg, a Cassini team scientist at the University of Heidelberg in Germany.

The data suggests a layer of water between the moon’s rocky core and its icy mantle, possibly as deep as about 50 miles (80 kilometers) beneath the surface. As this water washes against the rocks, it dissolves salt compounds and rises through fractures in the overlying ice to form reserves nearer the surface. If the outermost layer cracks open, the decrease in pressure from these reserves to space causes a plume to shoot out. Roughly 400 pounds (200 kilograms) of water vapor is lost every second in the plumes, with smaller amounts being lost as ice grains. The team calculates the water reserves must have large evaporating surfaces, or they would freeze easily and stop the plumes.

“We imagine that between the ice and the ice core there is an ocean of depth and this is somehow connected to the surface reservoir,” added Postberg.

The Cassini mission discovered Enceladus’ water-vapor and ice jets in 2005. In 2009, scientists working with the cosmic dust analyzer examined some sodium salts found in ice grains of Saturn’s E ring but the link to subsurface salt water was not definitive. The new paper analyzes three Enceladus flybys in 2008 and 2009 with the same instrument, focusing on the composition of freshly ejected plume grains. In 2008, Cassini discovered a high “density of volatile gases, water vapor, carbon dioxide and carbon monoxide, as well as organic materials, some 20 times denser than expected” in geysers erupting from the moon. The icy particles hit the detector target at speeds between 15,000 and 39,000 MPH (23,000 and 63,000 KPH), vaporizing instantly. Electrical fields inside the cosmic dust analyzer separated the various constituents of the impact cloud.

“Enceladus has got warmth, water and organic chemicals, some of the essential building blocks needed for life,” said Dennis Matson in 2008, Cassini project scientist at NASA’s Jet Propulsion Laboratory in Pasadena, California.

“This finding is a crucial new piece of evidence showing that environmental conditions favorable to the emergence of life can be sustained on icy bodies orbiting gas giant planets,” said Nicolas Altobelli, the European Space Agency’s project scientist for Cassini.

“If there is water in such an unexpected place, it leaves possibility for the rest of the universe,” said Postberg.

Monday, December 11, 2006

On December 7, BBC News reported a story about Dr James Anderson, a teacher in the Computer Science department at the University of Reading in the United Kingdom. In the report it was stated that Anderson had “solved a very important problem” that was 1200 years old, the problem of division by zero. According to the BBC, Anderson had created a new number, that he had named “nullity”, that lay outside of the real number line. Anderson terms this number a “transreal number”, and denotes it with the Greek letter ? {\displaystyle \Phi } . He had taught this number to pupils at Highdown School, in Emmer Green, Reading.

The BBC report provoked many reactions from mathematicians and others.

In reaction to the story, Mark C. Chu-Carroll, a computer scientist and researcher, posted a web log entry describing Anderson as an “idiot math teacher”, and describing the BBC’s story as “absolutely infuriating” and a story that “does an excellent job of demonstrating what total innumerate idiots reporters are”. Chu-Carroll stated that there was, in fact, no actual problem to be solved in the first place. “There is no number that meaningfully expresses the concept of what it means to divide by zero.”, he wrote, stating that all that Anderson had done was “assign a name to the concept of ‘not a number'”, something which was “not new” in that the IEEE floating-point standard, which describes how computers represent floating-point numbers, had included a concept of “not a number”, termed “NaN“, since 1985. Chu-Carroll further continued:

“Basically, he’s defined a non-solution to a non-problem. And by teaching it to his students, he’s doing them a great disservice. They’re going to leave his class believing that he’s a great genius who’s solved a supposed fundamental problem of math, and believing in this silly nullity thing as a valid mathematical concept.

“It’s not like there isn’t already enough stuff in basic math for kids to learn; there’s no excuse for taking advantage of a passive audience to shove this nonsense down their throats as an exercise in self-aggrandizement.

“To make matters worse, this idiot is a computer science professor! No one who’s studied CS should be able to get away with believing that re-inventing the concept of NaN is something noteworthy or profound; and no one who’s studied CS should think that defining meaningless values can somehow magically make invalid computations produce meaningful results. I’m ashamed for my field.”

There have been a wide range of other reactions from other people to the BBC news story. Comments range from the humorous and the ironic, such as the B1FF-style observation that “DIVIDION^[sic] BY ZERO IS IMPOSSIBLE BECAUSE MY CALCULATOR SAYS SO AND IT IS THE TRUTH” and the Chuck Norris Fact that “Only Chuck Norris can divide by zero.” (to which another reader replied “Chuck Norris just looks at zero, and it divides itself.”); through vigourous defences of Dr Anderson, with several people quoting the lyrics to Ira Gershwin‘s song “They All Laughed (At Christopher Columbus)”; to detailed mathematical discussions of Anderson’s proposed axioms of transfinite numbers.

Several readers have commented that they consider this to have damaged the reputation of the Computer Science department, and even the reputation of the University of Reading as a whole. “By publishing his childish nonsense the BBC actively harms the reputation of Reading University.” wrote one reader. “Looking forward to seeing Reading University maths application plummit.” wrote another. “Ignore all research papers from the University of Reading.” wrote a third. “I’m not sure why you refer to Reading as a ‘university’. This is a place the BBC reports as closing down its physics department because it’s too hard. Lecturers at Reading should stick to folk dancing and knitting, leaving academic subjects to grown ups.” wrote a fourth. Steve Kramarsky lamented that Dr Anderson is not from the “University of ‘Rithmetic“.

Several readers criticised the journalists at the BBC who ran the story for not apparently contacting any mathematicians about Dr Anderson’s idea. “Journalists are meant to check facts, not just accept whatever they are told by a self-interested third party and publish it without question.” wrote one reader on the BBC’s web site. However, on Slashdot another reader countered “The report is from Berkshire local news. Berkshire! Do you really expect a local news team to have a maths specialist? Finding a newsworthy story in Berkshire probably isn’t that easy, so local journalists have to cover any piece of fluff that comes up. Your attitude to the journalist should be sympathy, not scorn.”

Ben Goldacre, author of the Bad Science column in The Guardian, wrote on his web log that “what is odd is a reporter, editor, producer, newsroom, team, cameraman, soundman, TV channel, web editor, web copy writer, and so on, all thinking it’s a good idea to cover a brilliant new scientific breakthrough whilst clearly knowing nothing about the context. Maths isn’t that hard, you could even make a call to a mathematician about it.”, continuing that “it’s all very well for the BBC to think they’re being balanced and clever getting Dr Anderson back in to answer queries about his theory on Tuesday, but that rather skips the issue, and shines the spotlight quite unfairly on him (he looks like a very alright bloke to me).”.

From reading comments on his own web log as well as elsewhere, Goldacre concluded that he thought that “a lot of people might feel it’s reporter Ben Moore, and the rest of his doubtless extensive team, the people who drove the story, who we’d want to see answering the questions from the mathematicians.”.

Andrej Bauer, a professional mathematician from Slovenia writing on the Bad Science web log, stated that “whoever reported on this failed to call a university professor to check whether it was really new. Any university professor would have told this reporter that there are many ways of dealing with division by zero, and that Mr. Anderson’s was just one of known ones.”

Ollie Williams, one of the BBC Radio Berkshire reporters who wrote the BBC story, initially stated that “It seems odd to me that his theory would get as far as television if it’s so easily blown out of the water by visitors to our site, so there must be something more to it.” and directly responded to criticisms of BBC journalism on several points on his web log.

He pointed out that people should remember that his target audience was local people in Berkshire with no mathematical knowledge, and that he was “not writing for a global audience of mathematicians”. “Some people have had a go at Dr Anderson for using simplified terminology too,” he continued, “but he knows we’re playing to a mainstream audience, and at the time we filmed him, he was showing his theory to a class of schoolchildren. Those circumstances were never going to breed an in-depth half-hour scientific discussion, and none of our regular readers would want that.”.

On the matter of fact checking, he replied that “if you only want us to report scientific news once it’s appeared, peer-reviewed, in a recognised journal, it’s going to be very dry, and it probably won’t be news.”, adding that “It’s not for the BBC to become a journal of mathematics — that’s the job of journals of mathematics. It’s for the BBC to provide lively science reporting that engages and involves people. And if you look at the original page, you’ll find a list as long as your arm of engaged and involved people.”.

Williams pointed out that “We did not present Dr Anderson’s theory as gospel, although with hindsight it could have been made clearer that this is very much a theory and by no means universally accepted. But we certainly weren’t shouting a mathematical revolution from the rooftops. Dr Anderson has, in one or two places, been chastised for coming to the media with his theory instead of his peers — a sure sign of a quack, boffin and/or crank according to one blogger. Actually, one of our reporters happened to meet him during a demonstration against the closure of the university’s physics department a couple of weeks ago, got chatting, and discovered Dr Anderson reckoned he was onto something. He certainly didn’t break the door down looking for media coverage.”.

Some commentators, at the BBC web page and at Slashdot, have attempted serious mathematical descriptions of what Anderson has done, and subjected it to analysis. One description was that Anderson has taken the field of real numbers and given it complete closure so that all six of the common arithmetic operators were surjective functions, resulting in “an object which is barely a commutative ring (with operators with tons of funky corner cases)” and no actual gain “in terms of new theorems or strong relation statements from the extra axioms he has to tack on”.

Jamie Sawyer, a mathematics undergraduate at the University of Warwick writing in the Warwick Maths Society discussion forum, describes what Anderson has done as deciding that R ? { ? ? , + ? } {\displaystyle \mathbb {R} \cup \lbrace -\infty ,+\infty \rbrace } , the so-called extended real number line, is “not good enough […] because of the wonderful issue of what 0 0 {\displaystyle {\frac {0}{0}}} is equal to” and therefore creating a number system R ? { ? ? , ? , + ? } {\displaystyle \mathbb {R} \cup \lbrace -\infty ,\Phi ,+\infty \rbrace } .

Andrej Bauer stated that Anderson’s axioms of transreal arithmetic “are far from being original. First, you can adjoin + ? {\displaystyle +\infty } and ? ? {\displaystyle -\infty } to obtain something called the extended real line. Then you can adjoin a bottom element to represent an undefined value. This is all standard and quite old. In fact, it is well known in domain theory, which deals with how to represent things we compute with, that adjoining just bottom to the reals is not a good idea. It is better to adjoin many so-called partial elements, which denote approximations to reals. Bottom is then just the trivial approximation which means something like ‘any real’ or ‘undefined real’.”

Commentators have pointed out that in the field of mathematical analysis, 0 0 {\displaystyle {\frac {0}{0}}} (which Anderson has defined axiomatically to be ? {\displaystyle \Phi } ) is the limit of several functions, each of which tends to a different value at its limit:

• lim x ? 0 x 0 {\displaystyle \lim _{x\to 0}{\frac {x}{0}}} has two different limits, depending from whether x {\displaystyle x} approaches zero from a positive or from a negative direction.
• lim x ? 0 0 x {\displaystyle \lim _{x\to 0}{\frac {0}{x}}} also has two different limits. (This is the argument that commentators gave. In fact, 0 x {\displaystyle {\frac {0}{x}}} has the value 0 {\displaystyle 0} for all x ? 0 {\displaystyle x\neq 0} , and thus only one limit. It is simply discontinuous for x = 0 {\displaystyle x=0} . However, that limit is different to the two limits for lim x ? 0 x 0 {\displaystyle \lim _{x\to 0}{\frac {x}{0}}} , supporting the commentators’ main point that the values of the various limits are all different.)
• Whilst sin ? 0 = 0 {\displaystyle \sin 0=0} , the limit lim x ? 0 sin ? x x {\displaystyle \lim _{x\to 0}{\frac {\sin x}{x}}} can be shown to be 1, by expanding the sine function as an infinite Taylor series, dividing the series by x {\displaystyle x} , and then taking the limit of the result, which is 1.
• Whilst 1 ? cos ? 0 = 0 {\displaystyle 1-\cos 0=0} , the limit lim x ? 0 1 ? cos ? x x {\displaystyle \lim _{x\to 0}{\frac {1-\cos x}{x}}} can be shown to be 0, by expanding the cosine function as an infinite Taylor series, dividing the series subtracted from 1 by x {\displaystyle x} , and then taking the limit of the result, which is 0.

Commentators have also noted l’Hôpital’s rule.

It has been pointed out that Anderson’s set of transreal numbers is not, unlike the set of real numbers, a mathematical field. Simon Tatham, author of PuTTY, stated that Anderson’s system “doesn’t even think about the field axioms: addition is no longer invertible, multiplication isn’t invertible on nullity or infinity (or zero, but that’s expected!). So if you’re working in the transreals or transrationals, you can’t do simple algebraic transformations such as cancelling x {\displaystyle x} and ? x {\displaystyle -x} when both occur in the same expression, because that transformation becomes invalid if x {\displaystyle x} is nullity or infinity. So even the simplest exercises of ordinary algebra spew off a constant stream of ‘unless x is nullity’ special cases which you have to deal with separately — in much the same way that the occasional division spews off an ‘unless x is zero’ special case, only much more often.”

Tatham stated that “It’s telling that this monstrosity has been dreamed up by a computer scientist: persistent error indicators and universal absorbing states can often be good computer science, but he’s stepped way outside his field of competence if he thinks that that also makes them good maths.”, continuing that Anderson has “also totally missed the point when he tries to compute things like 0 0 {\displaystyle 0^{0}} using his arithmetic. The reason why things like that are generally considered to be ill-defined is not because of a lack of facile ‘proofs’ showing them to have one value or another; it’s because of a surfeit of such ‘proofs’ all of which disagree! Adding another one does not (as he appears to believe) solve any problem at all.” (In other words: 0 0 {\displaystyle 0^{0}} is what is known in mathematical analysis as an indeterminate form.)

To many observers, it appears that Anderson has done nothing more than re-invent the idea of “NaN“, a special value that computers have been using in floating-point calculations to represent undefined results for over two decades. In the various international standards for computing, including the IEEE floating-point standard and IBM’s standard for decimal arithmetic, a division of any non-zero number by zero results in one of two special infinity values, “+Inf” or “-Inf”, the sign of the infinity determined by the signs of the two operands (Negative zero exists in floating-point representations.); and a division of zero by zero results in NaN.

Anderson himself denies that he has re-invented NaN, and in fact claims that there are problems with NaN that are not shared by nullity. According to Anderson, “mathematical arithmetic is sociologically invalid” and IEEE floating-point arithmetic, with NaN, is also faulty. In one of his papers on a “perspex machine” dealing with “The Axioms of Transreal Arithmetic” (Jamie Sawyer writes that he has “worries about something which appears to be named after a plastic” — “Perspex” being a trade name for polymethyl methacrylate in the U.K..) Anderson writes:

We cannot accept an arithmetic in which a number is not equal to itself (NaN != NaN), or in which there are three kinds of numbers: plain numbers, silent numbers, and signalling numbers; because, on writing such a number down, in daily discourse, we can not always distinguish which kind of number it is and, even if we adopt some notational convention to make the distinction clear, we cannot know how the signalling numbers are to be used in the absence of having the whole program and computer that computed them available. So whilst IEEE floating-point arithmetic is an improvement on real arithmetic, in so far as it is total, not partial, both arithmetics are invalid models of arithmetic.

In fact, the standard convention for distinguishing the two types of NaNs when writing them down can be seen in ISO/IEC 10967, another international standard for how computers deal with numbers, which uses “qNaN” for non-signalling (“quiet”) NaNs and “sNaN” for signalling NaNs. Anderson continues:

[NaN’s] semantics are not defined, except by a long list of special cases in the IEEE standard.

“In other words,” writes Scott Lamb, a BSc. in Computer Science from the University of Idaho, “they are defined, but he doesn’t like the definition.”.

The main difference between nullity and NaN, according to both Anderson and commentators, is that nullity compares equal to nullity, whereas NaN does not compare equal to NaN. Commentators have pointed out that in very short order this difference leads to contradictory results. They stated that it requires only a few lines of proof, for example, to demonstrate that in Anderson’s system of “transreal arithmetic” both 1 = 2 {\displaystyle 1=2} and 1 ? 2 {\displaystyle 1\neq 2} , after which, in one commentator’s words, one can “prove anything that you like”. In aiming to provide a complete system of arithmetic, by adding extra axioms defining the results of the division of zero by zero and of the consequent operations on that result, half as many again as the number of axioms of real-number arithmetic, Anderson has produced a self-contradictory system of arithmetic, in accordance with Gödel’s incompleteness theorems.

One reader-submitted comment appended to the BBC news article read “Step 1. Create solution 2. Create problem 3. PROFIT!”, an allusion to the business plan employed by the underpants gnomes of the comedy television series South Park. In fact, Anderson does plan to profit from nullity, having registered on the 27th of July, 2006 a private limited company named Transreal Computing Ltd, whose mission statement is “to develop hardware and software to bring you fast and safe computation that does not fail on division by zero” and to “promote education and training in transreal computing”. The company is currently “in the research and development phase prior to trading in hardware and software”.

In a presentation given to potential investors in his company at the ANGLE plc showcase on the 28th of November, 2006, held at the University of Reading, Anderson stated his aims for the company as being:

• To build a transreal computer.
• To derive Maxwell’s equations and classical gravitation in transreal numbers so that they have no naked singularities (infinities affecting a neighbourhood of space).
• To collaborate with anyone who wants to unify Quantum Electro-Dynamics with gravitation.

To investors, Anderson makes the following promises:

• “I will help you develop a curriculum for transreal arithmetic if you want me to.”
• “I will help you unify QED and gravitation if you want me to.”
• “I will build a transreal supercomputer.”

He asks potential investors:

• “How much would you pay to know that the engine in your ship, car, aeroplane, or heart pacemaker won’t just stop dead?”
• “How much would you pay to know that your Government’s computer controlled military hardware won’t just stop or misfire?”

The current models of computer arithmetic are, in fact, already designed to allow programmers to write programs that will continue in the event of a division by zero. The IEEE’s Frequently Asked Questions document for the floating-point standard gives this reply to the question “Why doesn’t division by zero (or overflow, or underflow) stop the program or trigger an error?”:

“The [IEEE] 754 model encourages robust programs. It is intended not only for numerical analysts but also for spreadsheet users, database systems, or even coffee pots. The propagation rules for NaNs and infinities allow inconsequential exceptions to vanish. Similarly, gradual underflow maintains error properties over a precision’s range.

“When exceptional situations need attention, they can be examined immediately via traps or at a convenient time via status flags. Traps can be used to stop a program, but unrecoverable situations are extremely rare. Simply stopping a program is not an option for embedded systems or network agents. More often, traps log diagnostic information or substitute valid results.”

Simon Tatham stated that there is a basic problem with Anderson’s ideas, and thus with the idea of building a transreal supercomputer: “It’s a category error. The Anderson transrationals and transreals are theoretical algebraic structures, capable of representing arbitrarily big and arbitrarily precise numbers. So the question of their error-propagation semantics is totally meaningless: you don’t use them for down-and-dirty error-prone real computation, you use them for proving theorems. If you want to use this sort of thing in a computer, you have to think up some concrete representation of Anderson transfoos in bits and bytes, which will (if only by the limits of available memory) be unable to encompass the entire range of the structure. And the point at which you make this transition from theoretical abstract algebra to concrete bits and bytes is precisely where you should also be putting in error handling, because it’s where errors start to become possible. We define our theoretical algebraic structures to obey lots of axioms (like the field axioms, and total ordering) which make it possible to reason about them efficiently in the proving of theorems. We define our practical number representations in a computer to make it easy to detect errors. The Anderson transfoos are a consequence of fundamentally confusing the one with the other, and that by itself ought to be sufficient reason to hurl them aside with great force.”

Geomerics, a start-up company specializing in simulation software for physics and lighting and funded by ANGLE plc, had been asked to look into Anderson’s work by an unnamed client. Rich Wareham, a Senior Research and Development Engineer at Geomerics and a MEng. from the University of Cambridge, stated that Anderson’s system “might be a more interesting set of axioms for dealing with arithmetic exceptions but it isn’t the first attempt at just defining away the problem. Indeed it doesn’t fundamentally change anything. The reason computer programs crash when they divide by zero is not that the hardware can produce no result, merely that the programmer has not dealt with NaNs as they propagate through. Not dealing with nullities will similarly lead to program crashes.”

“Do the Anderson transrational semantics give any advantage over the IEEE ones?”, Wareham asked, answering “Well one assumes they have been thought out to be useful in themselves rather than to just propagate errors but I’m not sure that seeing a nullity pop out of your code would lead you to do anything other than what would happen if a NaN or Inf popped out, namely signal an error.”.

Sunday, April 17, 2005

The body of Sarah Lunde, a missing 13-year-old Florida girl, was found very close to her home Saturday, authorities said.

Lunde’s body was found by a search-and-rescue dog in an abandoned fish farm about a half-mile away from her home, according to David Gee, sheriff of Hillsborough County. Lunde had been missing since last Sunday from her home in Ruskin, a town to the south of Tampa.

Gee said the body had a green cast on one arm, just as Sarah did. “The green cast is apparent,” he said. He also stated that the body had been in the water for a long period of time, and that an autopsy would be performed to determine the cause of Lunde’s death.

“The family is very distraught,” Gee added.

According to CNN, David Onstott, 36, was charged late Saturday night with first-degree murder Gee said. “He is the defendant.”,Onstott confessed to the murder.He was arrested on Tuesday on a charge of aggravated assault with a deadly weapon. Aside from a 1995 sexual assault charge, Onstott is said to have been sighted at Lunde’s house hours after Lunde disappeared, and grabbed a half-empty beer bottle as he left. This could possibly link him to the numerous beer bottles found around the area, which, it is rumored, will be subjected to DNA testing. Onstott was also arraigned on Thursday on charges of not registering as a sex offender and is currently being held in the Hillsborough County Jail. Although his bond was set at $250,000, sheriff’s spokesman J.D. Callaway stated that since no bond was set on a Michigan drunk driving warrant Onstott is also being held for, there is no bond set on him for his various other charges, so Onstott is being held without bond for the moment.

This case is now the second such case in a month. Jessica Lunsford‘s body was found in Citrus County, north of Tampa, after she had been missing from her home for three weeks.

Convicted sex offender John E. Couey, who had been living near Lunsford’s home, was arrested and charged with her murder after he confessed.

Sunday, December 11, 2005

A series of large explosions have occurred close to Hemel Hempstead Hertfordshire, UK. The source of the explosions has been confirmed as the Hertfordshire Oil Storage Terminal (HOSL), Hemel Hempstead, known locally as the Buncefield complex. Up to 150 fire fighters are reported to be at the scene with 10 fire appliances and 1 specialist foamer.

The first ‘blast’ was heard near Hemel Hempstead on Sunday 11 Dec at 6 am. Further smaller explosions followed at 6:24am , 6:26am, 6:30am. BBC News 24 reported an additional, fourth large explosion. Hertfordshire Police Constabulary are currently treating the explosion as an accident.

Reports say the explosion, which registered 2.4 on the Richter scale, was heard as far away as Oxford, and Whitehall, Central London which is 60km (38 miles) away. Eyewitness statements report that the explosion was heard from at least 160km (100 miles) away and as far away as France and The Netherlands. Pilots reported noticing the blast from the North Sea and the West Country area of the UK. The M1 motorway which runs close by has been closed in both directions near the blast which is causing travel chaos as other roads become congested.

Malcom Stewart, a BBC News24 eyewitness who is a tanker driver for the site has reported that the site supplies several oil companies and is a joint operation between Total UK and Texaco, it is also used by BP, Shell and the British Pipeline association. The complex is not a refinery but a storage facility for refined petroleum awaiting distribution to airports and filling stations. The eyewitness reports that the depot has approximately 20 tanks which can hold about 3 million gallons (11 million litres or 70,000 barrels) each. Another News24 eyewitness has just reported that he has seen at least 5 of these tanks on fire.

The depot operates on a 24 hour basis and is split into 2 parts – aviation fuel and domestic fuel. A number of eyewitnesses have reported on UK news that the aviation fuel side appears to be the part of the site that has been affected.

Local authorities were not immediately available for comment but there have been reports of casualties.

Some reports on live television state that, “Several other neighbours said they did see a plane go into the depot.” BBC News 24 were also discussing the idea a possible plane crash as the cause of the explosions. Hertfordshire police have now gone on the record to say that there is no plane involved (BBC News24).

The police have issued a contact number 0800 096 0095 and asked that people do not call the emergency services in Hertfordshire directly unless it is an emergency.

In addition to being an oil storage depot, it is a major hub on the UK oil pipeline network with pipelines to Killingholme Lindsey Oil Refinery (LOR), Humberside (10 inch), Merseyside (10 and 12 inch), Coryton on the Thames Estuary (14 inch) and Heathrow (6 and 8 inch) and Gatwick airports radiating from it.

The disaster is believed to be the worst explosion at a petrochemical plant in the UK since the Flixborough disaster of 1974.Hertfordshire’s Chief Fire Officer Roy Wilsher said: “This is possibly the largest incident of its kind in peacetime Europe.”

A firefighting press officer said that they are stock piling foam from neighboring regions for a prolonged attach which they hope will stop the spread of the fire, however, the inferno itself will have to burn out which could take between 24 hours and a few days.

Despite the authorities saying that there is no need to panic buy petrol, filling stations have had above average queues since this morning and some small garages have ran out.

Deputy Prime Minister John Prescott has visited the scene.

Tuesday, May 8, 2007

Federal investigators in the United States have arrested six men on Monday evening on charges of conspiracy to kill US servicemembers. The men are alleged to be members of an Islamic radical terror cell who were planning a heavily armed attack against soldiers at the United States Army facility at Fort Dix in New Jersey.

The US Attorney’s Office said that some of the men were living illegally in the US, while others were legal immigrants. It identified the men as Dritan Duka, Eljvir Duka, Shain Duka, Serdar Tatar, Mohamad Shnewer and Agron Abdullahu. They were said to be four ethnic Albanians (from the former Yugoslavia), one from Turkey, and the sixth man from Jordan.

Reportedly, the FBI had the men under surveillance for 16 months as they trained with both paintball guns and real weapons in the Poconos Mountains area of Pennsylvania. The men video-taped their training and brought the tapes to a camera store to be copied to DVD. The camera store owner alerted the FBI, which then began its investigation.

The Star-Ledger reports that the men were lured by an FBI informant into a sting operation to meet with an arms dealer where they wanted to purchase five AK-47 automatic machine guns and three M-16 assault rifles at a residence in Cherry Hill, New Jersey. It was at this point they were arrested.

U.S. Attorney for New Jersey Christopher J. Christie called the camera store owner who tipped off the FBI to the terror cell “an American hero”, according to Richard Degener of The Press of Atlantic City. Christie spoke at the Flanders Hotel on Tuesday to the Ocean City Regional Chamber of Commerce. “The camera store owner saw Muslim men in military garb toting weapons in the woods. He heard them talking about jihad and how Allah was great. He called the FBI and became a hero,” Christie said.

One member of the terror cell was able to gain detailed knowledge of the military base from his work as a pizza delivery driver. The plot was to take over guard posts and “kill hundreds of Fort Dix soldiers”, Christie said. U.S. Marshal James Plousis joined Christie at the Chamber of Commerce luncheon with 50 area Atlantic City merchants to talk about the value of reporting suspicious activity.

“They are not being charged with being members of an international terror organisation,” said White House spokesperson, Tony Snow. “However, their involvement in weapons training, operational surveillance and discussions about killing American military personnel warranted a strong law enforcement response.”

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Wikinews accredited reporter Killing Vector traveled to the G-20 2009 summit protests in London with a group of protesters. This is his personal account.

Friday, April 3, 2009

London — “Protest”, says Ross Saunders, “is basically theatre”.

It’s seven a.m. and I’m on a mini-bus heading east on the M4 motorway from Cardiff toward London. I’m riding with seventeen members of the Cardiff Socialist Party, of which Saunders is branch secretary for the Cardiff West branch; they’re going to participate in a march that’s part of the protests against the G-20 meeting.

Before we boarded the minibus Saunders made a speech outlining the reasons for the march. He said they were “fighting for jobs for young people, fighting for free education, fighting for our share of the wealth, which we create.” His anger is directed at the government’s response to the economic downturn: “Now that the recession is underway, they’ve been trying to shoulder more of the burden onto the people, and onto the young people…they’re expecting us to pay for it.” He compared the protest to the Jarrow March and to the miners’ strikes which were hugely influential in the history of the British labour movement. The people assembled, though, aren’t miners or industrial workers — they’re university students or recent graduates, and the march they’re going to participate in is the Youth Fight For Jobs.

The Socialist Party was formerly part of the Labour Party, which has ruled the United Kingdom since 1997 and remains a member of the Socialist International. On the bus, Saunders and some of his cohorts — they occasionally, especially the older members, address each other as “comrade” — explains their view on how the split with Labour came about. As the Third Way became the dominant voice in the Labour Party, culminating with the replacement of Neil Kinnock with Tony Blair as party leader, the Socialist cadre became increasingly disaffected. “There used to be democratic structures, political meetings” within the party, they say. The branch meetings still exist but “now, they passed a resolution calling for renationalisation of the railways, and they [the party leadership] just ignored it.” They claim that the disaffection with New Labour has caused the party to lose “half its membership” and that people are seeking alternatives. Since the economic crisis began, Cardiff West’s membership has doubled, to 25 members, and the RMT has organized itself as a political movement running candidates in the 2009 EU Parliament election. The right-wing British National Party or BNP is making gains as well, though.

Talk on the bus is mostly political and the news of yesterday’s violence at the G-20 demonstrations, where a bank was stormed by protesters and 87 were arrested, is thick in the air. One member comments on the invasion of a RBS building in which phone lines were cut and furniture was destroyed: “It’s not very constructive but it does make you smile.” Another, reading about developments at the conference which have set France and Germany opposing the UK and the United States, says sardonically, “we’re going to stop all the squabbles — they’re going to unite against us. That’s what happens.” She recounts how, in her native Sweden during the Second World War, a national unity government was formed among all major parties, and Swedish communists were interned in camps, while Nazi-leaning parties were left unmolested.

In London around 11am the march assembles on Camberwell Green. About 250 people are here, from many parts of Britain; I meet marchers from Newcastle, Manchester, Leicester, and especially organized-labor stronghold Sheffield. The sky is grey but the atmosphere is convivial; five members of London’s Metropolitan Police are present, and they’re all smiling. Most marchers are young, some as young as high school age, but a few are older; some teachers, including members of the Lewisham and Sheffield chapters of the National Union of Teachers, are carrying banners in support of their students.

Stewards hand out sheets of paper with the words to call-and-response chants on them. Some are youth-oriented and education-oriented, like the jaunty “Gordon Brown‘s a Tory/He wears a Tory hat/And when he saw our uni fees/He said ‘I’ll double that!'” (sung to the tune of the Lonnie Donegan song “My Old Man’s a Dustman“); but many are standbys of organized labour, including the infamous “workers of the world, unite!“. It also outlines the goals of the protest, as “demands”: “The right to a decent job for all, with a living wage of at least £8 and hour. No to cheap labour apprenticeships! for all apprenticeships to pay at least the minimum wage, with a job guaranteed at the end. No to university fees. support the campaign to defeat fees.” Another steward with a megaphone and a bright red t-shirt talks the assembled protesters through the basics of call-and-response chanting.

Finally the march gets underway, traveling through the London boroughs of Camberwell and Southwark. Along the route of the march more police follow along, escorting and guiding the march and watching it carefully, while a police van with flashing lights clears the route in front of it. On the surface the atmosphere is enthusiastic, but everyone freezes for a second as a siren is heard behind them; it turns out to be a passing ambulance.

Crossing Southwark Bridge, the march enters the City of London, the comparably small but dense area containing London’s financial and economic heart. Although one recipient of the protesters’ anger is the Bank of England, the march does not stop in the City, only passing through the streets by the London Exchange. Tourists on buses and businessmen in pinstripe suits record snippets of the march on their mobile phones as it passes them; as it goes past a branch of HSBC the employees gather at the glass store front and watch nervously. The time in the City is brief; rather than continue into the very centre of London the march turns east and, passing the Tower of London, proceeds into the poor, largely immigrant neighbourhoods of the Tower Hamlets.

The sun has come out, and the spirits of the protesters have remained high. But few people, only occasional faces at windows in the blocks of apartments, are here to see the march and it is in Wapping High Street that I hear my first complaint from the marchers. Peter, a steward, complains that the police have taken the march off its original route and onto back streets where “there’s nobody to protest to”. I ask how he feels about the possibility of violence, noting the incidents the day before, and he replies that it was “justified aggression”. “We don’t condone it but people have only got certain limitations.”

A policeman I ask is very polite but noncommittal about the change in route. “The students are getting the message out”, he says, so there’s no problem. “Everyone’s very well behaved” in his assessment and the atmosphere is “very positive”. Another protestor, a sign-carrying university student from Sheffield, half-heartedly returns the compliment: today, she says, “the police have been surprisingly unridiculous.”

The march pauses just before it enters Cable Street. Here, in 1936, was the site of the Battle of Cable Street, and the march leader, addressing the protesters through her megaphone, marks the moment. She draws a parallel between the British Union of Fascists of the 1930s and the much smaller BNP today, and as the protesters follow the East London street their chant becomes “The BNP tell racist lies/We fight back and organise!”

In Victoria Park — “The People’s Park” as it was sometimes known — the march stops for lunch. The trade unions of East London have organized and paid for a lunch of hamburgers, hot dogs, french fries and tea, and, picnic-style, the marchers enjoy their meals as organized labor veterans give brief speeches about industrial actions from a small raised platform.

During the rally I have the opportunity to speak with Neil Cafferky, a Galway-born Londoner and the London organizer of the Youth Fight For Jobs march. I ask him first about why, despite being surrounded by red banners and quotes from Karl Marx, I haven’t once heard the word “communism” used all day. He explains that, while he considers himself a Marxist and a Trotskyist, the word communism has negative connotations that would “act as a barrier” to getting people involved: the Socialist Party wants to avoid the discussion of its position on the USSR and disassociate itself from Stalinism. What the Socialists favor, he says, is “democratic planned production” with “the working class, the youths brought into the heart of decision making.”

On the subject of the police’s re-routing of the march, he says the new route is actually the synthesis of two proposals. Originally the march was to have gone from Camberwell Green to the Houses of Parliament, then across the sites of the 2012 Olympics and finally to the ExCel Centre. The police, meanwhile, wanted there to be no march at all.

The Metropolitan Police had argued that, with only 650 trained traffic officers on the force and most of those providing security at the ExCel Centre itself, there simply wasn’t the manpower available to close main streets, so a route along back streets was necessary if the march was to go ahead at all. Cafferky is sceptical of the police explanation. “It’s all very well having concern for health and safety,” he responds. “Our concern is using planning to block protest.”

He accuses the police and the government of having used legal, bureaucratic and even violent means to block protests. Talking about marches having to defend themselves, he says “if the police set out with the intention of assaulting marches then violence is unavoidable.” He says the police have been known to insert “provocateurs” into marches, which have to be isolated. He also asserts the right of marches to defend themselves when attacked, although this “must be done in a disciplined manner”.

He says he wasn’t present at yesterday’s demonstrations and so can’t comment on the accusations of violence against police. But, he says, there is often provocative behavior on both sides. Rather than reject violence outright, Cafferky argues that there needs to be “clear political understanding of the role of violence” and calls it “counter-productive”.

Demonstration overall, though, he says, is always a useful tool, although “a demonstration is always a means to an end” rather than an end in itself. He mentions other ongoing industrial actions such as the occupation of the Visteon plant in Enfield; 200 fired workers at the factory have been occupying the plant since April 1, and states the solidarity between the youth marchers and the industrial workers.

I also speak briefly with members of the International Bolshevik Tendency, a small group of left-wing activists who have brought some signs to the rally. The Bolsheviks say that, like the Socialists, they’re Trotskyists, but have differences with them on the idea of organization; the International Bolshevik Tendency believes that control of the party representing the working class should be less democratic and instead be in the hands of a team of experts in history and politics. Relations between the two groups are “chilly”, says one.

At 2:30 the march resumes. Rather than proceeding to the ExCel Centre itself, though, it makes its way to a station of London’s Docklands Light Railway; on the way, several of East London’s school-aged youths join the march, and on reaching Canning Town the group is some 300 strong. Proceeding on foot through the borough, the Youth Fight For Jobs reaches the protest site outside the G-20 meeting.

It’s impossible to legally get too close to the conference itself. Police are guarding every approach, and have formed a double cordon between the protest area and the route that motorcades take into and out of the conference venue. Most are un-armed, in the tradition of London police; only a few even carry truncheons. Closer to the building, though, a few machine gun-armed riot police are present, standing out sharply in their black uniforms against the high-visibility yellow vests of the Metropolitan Police. The G-20 conference itself, which started a few hours before the march began, is already winding down, and about a thousand protesters are present.

I see three large groups: the Youth Fight For Jobs avoids going into the center of the protest area, instead staying in their own group at the admonition of the stewards and listening to a series of guest speakers who tell them about current industrial actions and the organization of the Youth Fight’s upcoming rally at UCL. A second group carries the Ogaden National Liberation Front‘s flag and is campaigning for recognition of an autonomous homeland in eastern Ethiopia. Others protesting the Ethiopian government make up the third group; waving old Ethiopian flags, including the Lion of Judah standard of emperor Haile Selassie, they demand that foreign aid to Ethiopia be tied to democratization in that country: “No recovery without democracy”.

A set of abandoned signs tied to bollards indicate that the CND has been here, but has already gone home; they were demanding the abandonment of nuclear weapons. But apart from a handful of individuals with handmade, cardboard signs I see no groups addressing the G-20 meeting itself, other than the Youth Fight For Jobs’ slogans concerning the bailout. But when a motorcade passes, catcalls and jeers are heard.

It’s now 5pm and, after four hours of driving, five hours marching and one hour at the G-20, Cardiff’s Socialists are returning home. I board the bus with them and, navigating slowly through the snarled London traffic, we listen to BBC Radio 4. The news is reporting on the closure of the G-20 conference; while they take time out to mention that Canadian Prime Minister Stephen Harper delayed the traditional group photograph of the G-20’s world leaders because “he was on the loo“, no mention is made of today’s protests. Those listening in the bus are disappointed by the lack of coverage.

Most people on the return trip are tired. Many sleep. Others read the latest issue of The Socialist, the Socialist Party’s newspaper. Mia quietly sings “The Internationale” in Swedish.

Due to the traffic, the journey back to Cardiff will be even longer than the journey to London. Over the objections of a few of its members, the South Welsh participants in the Youth Fight For Jobs stop at a McDonald’s before returning to the M4 and home.