Operation Arc Light was the 1965 deployment of B-52D Stratofortresses as conventional bombers from bases in the US to Guam to support ground combat operations in Vietnam. By extension, Arc Light, and sometimes Arclight, is the code name and general term for the use of B-52 Stratofortress as a close air support (CAS) platform to support ground tactical operations assisted by ground-control-radar detachments of the 1st Combat Evaluation Group (1CEVG) in Operation Combat SkySpot during the Vietnam War. At the same time, investigations of secret CIA activities in Laos revealed that B-52s were used to systematically bomb Laos and Cambodia. In fact, the United States dropped more bombs on Laos than it did during World War II on Germany and Japan combined. To this day, vast areas of Laos and Cambodia are uninhabitable because of unexploded ordnance. In 1964, the U.S. Air Force began to train strategic bomber crews in the delivery of conventional munitions. Under Project Big Belly, all B-52Ds