Former U.S. Sen. John W. Warner, left, introduces Secretary of Defense Leon E. Panetta at the Law of the Sea Convention forum at the Willard Intercontinental Washington Hotel in Washington, D.C., May 9, 2012. Top defense leaders argued at the forum for the U.S. to ratify a long-debated treaty governing ocean rights to bolster the nation's national security interests in the Asia-Pacific region and other key global waters.