A composite of three aerial photographs believed to depict U.S. Marine Corps CH-53 Sea Stallion helicopters of Squadron HMH-463 during the Vietnam War era, including what appears to be an in-flight recovery or tandem-lift operation and a high-angle view of an aircraft resting on the ground below. Such heavy-lift helicopters were used extensively for troop insertion, resupply, and downed-aircraft recovery in the rugged terrain along the South Vietnam-Laos border. Project: 219439