In March, Stephen Younger resigned as director of the Defense Threat Reduction Agency (DTRA) to return to Los Alamos National Laboratory. US Air Force Major General Trudy H. Clark is acting director of the Fort Belvoir, Virginia-based agency until the Department of Defense finds a replacement.
The DTRA, where Younger had worked for two and a half years, was formed six years ago from various units within the DOD (see Physics Today, Physics Today 0031-9228 56 2 2003 23 https://doi.org/10.1063/1.1564337 February 2003, page 23 ). Younger integrated those units and built the DTRA into a combat support agency, says Dale Klein, assistant to the secretary of defense for nuclear, chemical, and biological defense programs.
Back at Los Alamos, Younger is working on computer simulations of societal behavior, especially as it relates to terrorism and war. “I believe that the frontier of national security studies is moving from the physical...
