The document discusses the end of the Cold War between the United States and Soviet Union. It describes Ronald Reagan's projection of American force abroad and support for anti-Soviet groups. Mikhail Gorbachev came to power in the Soviet Union and instituted reforms of "perestroika" and "glasnost", improving relations. However, the Soviet Union was experiencing economic difficulties and stagnation under aging leaders. Reagan's famous speech urged Gorbachev to "tear down this wall" in Berlin, and the Berlin Wall later fell as the Soviet Union spun beyond control, leading to its dissolution in 1991 and the end of the Cold War.