This chronology commemorates the golden anniversary of the establishment of the United States Air Force (USAF) as an independent service. Dedicated to the men and women of the USAF past, present, and future, it records significant events and achievements from 18 September 1947 through 9 April 1997. Since its establishment, the USAF has played a significant role in the events that have shaped modem history. Initially, the reassuring drone of USAF transports announced the aerial lifeline that broke the Berlin blockade, the Cold War's first test of wills. In the tense decades that followed, the USAF deployed a strategic force of nuclear-capable intercontinental bombers and missiles that deterred open armed conflict between the United States and the Soviet Union. During the Cold War's deadly flash points, USAF jets roared through the skies of Korea and Southeast Asia, wresting air superiority from their communist opponents and bringing air power to the support of friendly ground forces. In the great global competition for the hearts and minds of the Third World, hundreds of USAF humanitarian missions relieved victims of war, famine, and natural disaster. The Air Force performed similar disaster relief services on the home front. Over Grenada, Panama, and Libya, the USAF participated in key contingency actions that presaged post-Cold War operations.