been at least one case where a fissile material component of a weapon was stolen and then recovered. 6 Furthermore, there is a huge quantity of nuclear materials, dispersed throughout Russia, that is even less secure. Reliable estimates put the Russian inventory at between 150 and 165 metric tonnes of weapons grade plutonium, and 1000 and 1300 metric tonnes of enriched uranium. 7 However, no one really knows what quantities are involved because, during the Cold War, Soviet facilities were set production targets. When these were exceeded, material was kept aside, rather than declared, so as to compensate for any shortfalls in subsequent targets. 8 Consequently, such facilities were more concerned with producing as much nuclear material as possible, rather than keeping an accurate record of existing stocks. Furthermore, material was counted in ruble value, rather than in weight, and inventories could be off by several tons. 9 Obviously, this poses immense problems of accounting, and the danger is heightened by poor security, especially at nuclear sites, secret cities and research institutes. The problem stems, at least in part, from the fact that, in the Soviet Union, nuclear security was dependent on it being a closed state, with strict controls over foreign travel by its citizens; internal security within the state was tight, discipline was rigidly enforced when controls were violated, and there was simply no black market for nuclear materials. Personnel were screened and closely supervised by members of the security services. Usually, nuclear material could be accessed only by a three man team: two technicians and a member of the security services.