MARK M. LOWENTHAL is the senior specialist in U.S. foreign policy at the Congressional Research Service (CRS) of the Library of Congress. From 1985 to 1989, he served in the State Department's Bureau of Intelligence and Research, first as director of the Office of Strategic Forces Analysis and then as deputy assistant secretary for functional analysis. Prior to that he was a specialist in national defense at CRS and also served as head of CRS's Defense/Arms Control and Europe/Middle East/Africa sections. His publications include Leadership and Indecision: American War Planning and Policy Proccess, 1937-1942, as well as numerous articles and congressional studies on national security issues.