U.S. Defense Secretary Jim Mattis said Thursday the United States will maintain its current troop levels in South Korea and that the U.S. defense commitment to its key Asian ally remains "ironclad."At the outset of a meeting with his South Korean counterpart Song Young Moo in Seoul, Mattis said the United States will continue to use a "full range of diplomatic and military capabilities to uphold this commitment.""This incudes maintaining the current U.S. force levels on the Korean Peninsula," he added.The remarks come a week after the United States and South Korea agreed to suspend a major …READ FULL ARTICLE