The United States and North Korea will not discuss the reduction of U.S. military forces in South Korea at their first-ever summit, planned for June 12 in Singapore, U.S. Defense Secretary Jim Mattis said Saturday.His remarks came amid growing speculation that Washington may consider decreasing the U.S. military presence in South Korea if Pyongyang pledges to achieve complete and verifiable denuclearization.Any discussions about the number of U.S. troops in South Korea are "separate" from negotiations going on with Pyongyang, Mattis said, adding the issue will not be raised in talks between…READ FULL ARTICLE