A Douglas B-26 Invader taxis across a pierced-steel-planking (PSP) runway at a forward airstrip in Southeast Asia. Originally a World War II-era design, the rugged Invader was pressed back into service in the early 1960s by USAF Air Commando units — including the classified "Farm Gate" detachment — providing close air support and interdiction for counterinsurgency operations in South Vietnam. Project: 219050