In a dramatic shift from Cold War tensions, Soviet leader Mikhail Gorbachev and U.S. President Ronald Reagan put aside their differences to sign the Intermediate-Range Nuclear Forces Treaty at the White House. This groundbreaking agreement marked the first time the superpowers agreed to dismantle nuclear weapons, eliminating an entire class of missiles from their arsenals. The treaty marked a significant milestone in the thawing of the Cold War, as Reagan and Gorbachev worked together to reduce the threat of nuclear war.