Andrew Lawler
Los Alamos, New Mexico--The decision to stop underground nuclear testing has made computer simulations the chief tool for ensuring that the U.S. nuclear arsenal is reliable. But a $4 billion program, called stockpile stewardship and management, has triggered a fierce debate within the defense community. At issue is how to balance the cost of such new facilities as the $1.1 billion National Ignition Facility, which will simulate the conditions of nuclear detonation, with the need to keep enough experienced weapons designers on hand for core research activities.