- Return to List of Contents Preventing the Threat of Nuclear Terrorism: The Case of Russia By Vladimir Orlov Disarmament Diplomacy -- Issue No 20 Introduction In the Soviet Union - from the first nuclear test in 1949 to the Lithuanian crisis of 1990 which heralded the State's dissolution - there were many factors guaranteeing the secure protection of fissile materials (not to mention nuclear ...www.acronym.org.uk/dd/dd20/20terr.htm