File photo taken in February 2016 shows University of Virginia student Otto Warmbier speaking at a press conference in Pyongyang. North Korea's top court on March 16 sentenced Warmbier, who has been detained since early January for committing what Pyongyang calls an anti-state hostile act, to hard labor for 15 years amid rising tensions over North Korea's nuclear and missile development programs. (Kyodo) ==Kyodo