Gli stati Uniti confermano l'avvenuto test nucleare:
U.S. confirms test:
An analysis of air samples collected shortly after North Korea declared it had conducted the test confirms it took place, according to the office of the U.S. director of national intelligence.
The analysis detected radioactive debris, indicating the explosive yield was some less than one kiloton, said a statement from John Negroponte's office. That is relatively small for a nuclear test.
The first air sample collected after Pyongyang's announcement last week contained no radioactive debris, but a second one did.
Lorenzo
Miles Insulae