Mystery of Invisible Nuclear Telltale Evidence

Allies sniff air for clues on N Koreas nukes

                                                                                   Nations condemn third North Korean nuclear test, including ally China. Washington: The US, South Korea and Japan are sniffing the air in a coordinated intelligence effort to determine what type of nuclear device was detonated by North Korea's secretive regime. The country's two previous underground nuclear tests, in 2006 and 2009, drew on its limited reserves of plutonium. Air-sampling equipment, some in aircraft and some at ground-based facilities, are sniffing for residual radioactive emissions from the underground tests that would confirm it was a nuclear explosion and provide markers for the type of fissile material used.

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Allies Seek Clues About North Korea's Nuclear Blast

                                                              The U.S., South Korea and Japan are sniffing the air in a coordinated intelligence effort to determine what type of nuclear device was detonated by North Korea’s secretive regime. The country’s two previous underground nuclear tests, in 2006 and 2009, drew on its limited reserves of plutonium. Any evidence that North Korea used highly enriched uranium this time would signal that it has developed a second source of fissile material, expanding its potential warhead capabilities and raising the risk that the cash-strapped nation may sell such uranium to would-be nuclear weapons states such as Iran. North Korea tested “a smaller and light” nuclear device Feb.

http://www.bloomberg.com/news/2013-02-13/allies-seek-clues-about-north-korea-s-nuclear-blast.html

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                                                                              In the two earlier tests, North Korea is believed to have used plutonium ... The think tank also reported that there had been no sign of vehicles or people at the site for a day after North Korea proceeded with its third nuclear test ... SEOUL, South Korea - North Korea's neighbours bolstered their military preparations and mobilized scientists Wednesday to determine whether Pyongyang's third nuclear test, conducted in defiance of U.N. warnings, was as successful as the North claimed. On 12 February, an explosion was set off in the country’s northeast, close to the location of the two previous nuclear tests in 2006 and 2009.