The Lebanon Crisis of 1958, the Berlin Crisis of 1961, and the Cuban Missile Crisis of 1962 demonstrated a need for the capability to respond to worldwide emergencies. Aircraft and support personnel were being deployed without providing runways, water supply, electricity, housing, and other facilities necessary to support them. Civil engineering personnel, who could rapidly respond, were needed to accompany aircraft and to provide basing facilities. The U.S. Air Force's answer was the Prime BEEF program.