David Mosher directs the National Security Division at the Congressional Budget Office. Before joining CBO, he was a Senior Policy Analyst at the RAND Corporation where he focused on Army strategy and operational issues, homeland security, terrorist acquisition and use of WMD, nuclear policy, WMD proliferation issues, and missile defenses. He has written papers, studies, and articles on a wide variety of issues, including deterrence and nuclear arms control policy, China’s military space capabilities, and preparing individuals for catastrophic nuclear, chemical, biological, radiological, and high explosive terrorist attacks, how terrorists might acquire WMD, reducing nuclear threats from Russia, ballistic missile defenses, arms control, and defense budget issues, improving Army handling of environmental issues in contingency operations, achieving a full spectrum Army, requirements for special forces aviation, organizing Army forces for homeland security, improving Army planning for civil support. He was a panel member and staff director of the American Physical Society’s study on boost-phase defenses. Before joining RAND, he spent ten years in the National Security Division at the Congressional Budget Office.