[1/3] U.S.President Donald Trump speaks to the media next to the Americans released from detention in North Korea, Tony Kim, Kim Hak-song and Kim Dong-chul, upon their arrival at Joint Base Andrews, Maryland, U.S., May 10, 2018. REUTERS/Jonathan Ernst/File Photo WASHINGTON, July 18 (Reuters) - A U.S. soldier facing disciplinary action crossed into North Korea on Tuesday and was believed to be in North Korean custody, U.S. officials said, creating a fresh headache for Washington in its dealings with the nuclear-armed state. Here are some other Americans held in the past by North Korea. Most were sentenced to years of...