The U.S., Russia, and China drive each other’s nuclear requirements. China and Pakistan drive India’s nuclear requirements, and India’s capabilities, now augmented by U.S. and other foreign assistance, play back on Pakistan and China. What happens in one of these triads affects the other, most likely through the common point of China. In the balance hang prospects for a ban on fissile material production and future multilateral nuclear arms control and disarmament. Are these dynamics sufficiently understood? Can they be managed in a stabilizing way? What are the implications for the nonproliferation regime?