U.S. Vice President Mike Pence arrives with U.S. Gen. Vincent Brooks, second from right, commander of the United Nations Command, U.S. Forces Korea and Combined Forces Command, and South Korean Deputy Commander of the Combined Force Command Gen. Leem Ho-young, left, at the border village of Panmunjom in the Demilitarized Zone (DMZ) which has separated the two Koreas since the Korean War, South Korea, Monday, April 17, 2017. Viewing his adversaries in the distance, Pence traveled to the tense zone dividing North and South Korea and warned Pyongyang that after years of testing the U.S. and South Korea with its nuclear ambitions, "the era of strategic patience is over." (AP Photo/Lee Jin-man)