62 years ago today, June 20, 1963 (April 29, 1963, the lunar calendar), the United States and the Soviet Union decided to establish a hotline between the two countries. On June 20, 1963, the United States and the Soviet Union decided to set up a hotline between the two countries, which was set up for the heads of state of the two countries to communicate in times of emergency during the Cold War. But the system was never put into use after testing.