Emerging strategic trends indicate that the security environment in the Asia-Pacific region is becoming more complex and uncertain, with the gradual diffusion of power and proliferation of nuclear and ballistic-missile capabilities. The Asia-Pacific region is now home to the largest number of states possessing nuclear weapons (NWS) in the world. In addition to the two nuclear superpowers—Russia and the United States—China, India, and Pakistan possess sizable nuclear arsenals. Australia, Japan, and South Korea enjoy the protection of the U.S. extended nuclear deterrence umbrella and either have some American nuclear weapons deployed on their territory or provide special facilities to.....