Kim Dong Chul, a South Korean-born American citizen detained in North Korea, is escorted to his trial April 29 in Pyongyang. A North Korean court sentenced Kim to 10 years in prison for what it called acts of subversion and espionage. North Korea watchers interpret the detainment of Americans and other foreign citizens as a collection of bargaining chips by the reclusive regime.
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Photos:Americans detained abroad
University of Virginia student Otto Frederick Warmbier was detained by North Korea after being accused of carrying out "a hostile act" against the government, state media reported. In March, he was sentenced to 15 years of hard labor for allegedly removing a political banner from a Pyongyang hotel.