Since India declared itself a nuclear weapon state in May 1998, its nuclear capabilities have grown significantly. India is now on the verge of acquiring a triad of nuclear delivery systems. Its increasing nuclear profile has also stirred a debate on its stated nuclear doctrine involving principles of no-first use and massive retaliation. This Letort Paper examines changes in India’s nuclear trajectory, the accompanying doctrinal debate, and its nonproliferation policies in the backdrop of the current regional and international context. The implications of this for the United States and its policy in the Asia-Pacific region are also discussed.