Twenty-five years ago this Sunday, the world gave a heavy sigh of relief. On July 31st, 1991, Presidents Mikhail Gorbachev and George H.W. Bush signed the first Strategic Arms Reduction Treaty, or more commonly, START I. The treaty limited the nuclear arsenals on either side of the Iron Curtain to 6,000 warheads and 1,600 Strategic Nuclear Delivery Vehicles (SNDVs) by 1999.