During a test last November, the intermediate range ballistic missile Shaheen 1A (Hatf IV) is launched from an undisclosed location in Pakistan in a photo supplied by the Pakistani military. The missile is said to be capable of carrying nuclear warheads. [E]yisilanbao/Xinhua/Landov hide caption

toggle caption [E]yisilanbao/Xinhua/Landov

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 hide caption

toggle caption Chung Sung-Jun/Getty Images
NPR's Tom Gjelten and Melissa Block discuss the story
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