The future of U.S. national security in this century will be determined largely in the Asia-Pacific region, where the American military must maintain its presence despite China's development of new weapons that threaten U.S. power projection capabilities, Defense Secretary Leon Panetta said today. In what was billed by the Woodrow Wilson International Center for Scholars as Panetta's first policy speech since taking office in July, the defense secretary called for a greater focus on the region to remain competitive with...