On Aug. 2, the United States officially leaves the Intermediate-Range Nuclear Forces (INF) Treaty, 32 years after U.S. President Ronald Reagan and Soviet leader Mikhail Gorbachev signed the agreement to ban nuclear and conventional ground-launched ballistic and cruise missiles with a range of 500-5,500 kilometers (310-3,410 miles). As the end of the INF Treaty threatens to accelerate and intensify an ongoing arms race, we look back on some of our key stories charting the fall of that agreement, as well as the status of other key arms control deals....