He received B.S., M.S., and Ph.D. degrees in aerospace engineering from the University of Maryland and an M.S. in electrical engineering, with emphasis on radar and communication systems, from Johns Hopkins University. Dr. Van Wie has served on numerous scientific boards and advisory committees, to include the NRC Committee on Conventional Prompt Global Strike Capability.

David R. Vaughan is a senior engineer in the Technology and Applied Science Department at the RAND Corporation. Prior to joining RAND in 1986, he worked at R&D Associates, the Institute for Defense Analyses, and the McDonnell Douglas Aerospace Corporation. At RAND, Dr. Vaughan has performed research on countering hostile UAVs, nontraditional ISR, and counterinsurgency aircraft. Previously, he supported studies on close air support: technology and tactics; space support for military operations; and intelligence, surveillance and reconnaissance end-to-end analysis. Earlier, he led projects on the reconnaissance and surveillance force mix, which analyzed airborne and space SIGINT, IMINT and MTI sensors and platforms; theater missile defense/critical mobile targets, which performed operational and technical analyses of boost- and ascent-phase intercept, and air-to-surface attack operations; advanced technical options for conventional cruise missiles; and a net assessment of U.S. and Soviet strategic missile penetration systems. At R&D Associates, he worked on U.S. and Soviet offense and defense systems. At the Institute for Defense Analyses, his work included surface-to-air interceptor missile performance limits, submarine-launched ballistic missile performance limits, and radar tracking and prediction analysis. He was a member of the American Physical Society study panel on boost-phase intercept systems for national missile defense and an ad hoc member of an Air Force Scientific Advisory Board on theater air and missile defense. He is an associate fellow of the AIAA and a recipient of the Leo Szilard Award of the American Physical Society. Dr. Vaughan received his Ph.D. in mechanical engineering from the Massachusetts Institute of Technology.

Dean Wilkening is at Lawrence Livermore National Laboratory, having recently moved from serving as a senior research scientist at the Center for International Security and Cooperation at Stanford University. He holds a Ph.D. in physics from Harvard University and worked at the RAND Corporation prior to coming to Stanford. His major research interests include nuclear strategy and policy, arms control, the proliferation of nuclear and biological weapons, bioterrorism, ballistic missile defense, and energy and security. His most recent research focuses on the technical, strategic, and political aspects of ballistic missile defense deployments in northeast Asia, south Asia, and Europe. Prior work focused on the technical feasibility of boost-phase ballistic missile defense interceptors. His recent work on bioterrorism focuses on understanding the scientific and technical uncertainties associated with predicting the outcome of hypothetical airborne biological attacks and the human effects of inhalation anthrax, with the aim of



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