One of the biggest challenges facing our world this century is the erosion of global security in a nuclear-armed world. The world’s combined stockpile of nuclear warheads remains at a high and frightening level – more than 24,000 -- despite being two decades removed from the end of the Cold War.

Federation of American Scientists (FAS) Vice President Dr. Ivan Oelrich explains the history of how the nuclear-armed world got to this point, and how we can begin to move down a path to zero.

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