The UPA Special Studies series offers federally commissioned, in-depth research on topics of the highest priority from leading public and private policy research facilities. The authors of these studies are associated with such institutions as the Army War College's Strategic Studies Institute, the National Defense University, the Institute for Defense Analysis, the Rand Corporation, Pacific-Sierra Research Corporation, Naval Postgraduate School, the Lawrence Livermore and Los Alamos National Laboratories, Science Applications International Corporation, and major international institutes at leading universities. The series examines all the issues surrounding the international debate on nuclear weapons, their nature and deployment, the prospects for controlling their spread, and the consequences of using them. Many of the studies explore the substantial political, ideological, and technical barriers that have often blocked real progress toward limiting nuclear weapons. Most notably, the studies assess the strategic reevaluations by American and Soviet leadership made in the light of domestic pressures and international crises.