Dr. Alan Wan is Deputy Program Director for the Weapon Physics and Design Program and High-energy-density Physics Experiments Execution Program Leader at Lawrence Livermore National Laboratory. He received his Sc.D. degree in nuclear engineering from the Massachusetts Institute of Technology in 1986 and joined the lab upon graduation. He has worked on various nuclear weapons design projects, including assessment and certification of some weapons systems in the present nuclear stockpile, as well as the strategic defense initiative and weapon physics. In 1996-1997, Dr. Wan served as a special scientific advisor to Dr. Vic Reis, Assistant Secretary of Energy for Defense Programs. Dr. Wan now leads the effort to improve predictive understanding of weapons performance and to develop tools to modernize our assessment capabilities in support of the Stockpile Stewardship Program.