sentences:  The problem was that due to the weakened economy of the Soviet Union, Russia's stockpile of nuclear waste and weaponry were left for free picking by anyone, which included possible terrorists.This security threat is a direct possibility of the fall of the FSU (Former Soviet Union) because security implemented before the fall also fell with it.To help solve this and alleviate risk, U.S. Congress passed the Soviet Nuclear Threat Reduction Act in 1991.