The United Nations Command and North Korea have begun discussing the case of Travis King, the U.S. soldier who crossed into the North last week, the deputy commander of the U.S.-led command that oversees the Korean War truce said on Monday. King, a U.S. Army private serving in South Korea, sprinted into North Korea on July 18 while on a tour of the Demilitarized Zone on the inter-Korean border, landing Washington in a fresh diplomatic quandary with the nuclear-armed North. Conversations between