N. Korea nuke test may offer intelligence clues

North Korea ' s underground
nuclear test shows it is making big strides
toward becoming a true nuclear power .
But the test may also reveal key clues the
secretive nation might have hoped to
hide about how close, or how far away, it
is from fielding a nuclear weapon capable
of striking the United States or its allies.

http://www.airforcetimes.com/mobile/news/2013/02/ap-north-korea-nuke-test-offers-intelligence-clues-021313