The treaty calls for both Russia and the United States to draw down to no more than 1,550 strategic nuclear warheads within seven years. These are weapons designed for taking out “soft” targets, such as cities, in long-range missions of a nuclear war.
Russia currently deploys about 2,600 such warheads; the US arsenal hovers somewhere below 2,000. The original US-Russia arms reduction treaty, proposed by President Ronald Reagan, limited each side to 5,000 long-range warheads.