In May 1998, India shocked the world--and many of its own citizens--by detonating five nuclear weapons in the Rajasthan desert. Why did India bid for nuclear weapon status at a time when 149 nations had signed a ban on nuclear testing? What drove India's new Hindu nationalist government to depart from decades of nuclear restraint, a control that no other nation with similar capacities had displayed? How has U.S. nonproliferation policy affected India's...