The cover of "The Rescue of Bat 21" by Darrel D. Whitcomb, which chronicles the 1972 mission to rescue downed USAF navigator Lt. Col. Iceal Hambleton from behind enemy lines in Vietnam. A-1 Skyraider pilots, flying under the callsign "Sandy," provided critical close air support throughout the eleven-day rescue effort, one of the most complex combat search-and-rescue operations of the war. Project: 219105