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SEOUL, SOUTH KOREA - MARCH 26:  A Man watchs a television broadcast reporting the North Korean missile launch at the Seoul Railway Station on March 26, 2014 in Seoul, South Korea. North Korea test-launched two Nodong medium-range ballistic missiles into the sea off Korean peninsula's east coast on Wednesday morning, according to South Korea's defence ministry.  (Photo by Chung Sung-Jun/Getty Images)
SEOUL, SOUTH KOREA - MARCH 26:  A Man watchs a television broadcast reporting the North Korean missile launch at the Seoul Railway Station on March 26, 2014 in Seoul, South Korea. North Korea test-launched two Nodong medium-range ballistic missiles into the sea off Korean peninsula's east coast on Wednesday morning, according to South Korea's defence ministry.  (Photo by Chung Sung-Jun/Getty Images)

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North Korea threatens nuclear strikes against U.S.

In an ominous warning, North Korea is threatening to nuclear strikes against the U.S. and South Korea as the two allies participate in joint military exercises. CNN's Elise Labott has more.

North Korea threatens nuclear strikes against U.S.

In an ominous warning, North Korea is threatening to nuclear strikes against the U.S. and South Korea as the two allies participate in joint military exercises. CNN's Elise Labott has more.