Some analysts have questioned whether U.S. security interests in the Asia Pacific region are best served by its existing framework of bilateral alliances. Pursuit of multilateral security arrangements holds a number of potential challenges and opportunities for the United States. Increasing capabilities among like-minded nations could enhance stability and provide a platform for responding to natural disasters and humanitarian emergencies in the region, or to potential aggression by other countries, but it also risks threatening China, potentially spurring dangerous countermeasures. There is also the risk that other Asian allies, such as South Korea, Thailand, and the Philippines, could feel excluded from multilateral initiatives among the United
States, Japan, Australia, and/or India.