In an April 29, 2016, file photo, Kim Dong Chul, center, a U.S. citizen detained in North Korea, is escorted from a courtroom after his trial in Pyongyang, North Korea. He is one of three Americans currently detained by the Pyongyang regime.

In an April 29, 2016, file photo, Kim Dong Chul, center, a U.S. citizen detained in North Korea, is escorted from a courtroom after his trial in Pyongyang, North Korea. He is one of three Americans currently detained by the Pyongyang regime.