A South Korean soldier stands at a military checkpoint connecting South and North Korea at the Unification Bridge last week in Paju, South Korea.
Chung Sung-Jun/Getty Images
April 11, 2013 The assessment says such a weapon would probably not be very reliable. This is the first time the U.S. has concluded that Pyongyang's nuclear efforts have reached this point.
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February 3, 2011 In the first hour of Talk of the Nation, Pakistan's nuclear weapons, and the magic of snail mail. In our second hour, Black history in the White house, and Egyptian Americans on watching protests back home.
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