An estimated 90 to 110 Indian nuclear bombs are stored in six or so government-run sites patrolled by the same security force, according to the Stockholm International Peace Research Institute, an independent think tank, and Indian officials. Within the next two decades, as many as 57 reactors could also be operating under the force’s protection, as well as four plants where spent nuclear fuel is dissolved in chemicals to separate out plutonium to make new fuel or be used in nuclear bombs...alarmed Indian and Western officials who question whether this country — which is surrounded by unstable neighbors and has a history of civil tumult — has taken adequate precautions to safeguard its sensitive facilities and keep the building blocks of a devastating nuclear bomb from being stolen by insiders with grievances, ill motives, or in the worst case, connections to terrorists....Although experts say they regard the issue as urgent, Washington is not pressing India for quick reforms.