Individual aircraft revetments line a Vietnam-era flight line at dusk. Built from corrugated steel and earth fill, these blast walls protected parked aircraft from rocket and mortar attack — a defensive measure adopted after enemy strikes on massed aircraft in the mid-1960s. A propeller-driven attack aircraft, likely an A-1 Skyraider, sits sheltered in the nearest bay alongside typical ground support equipment of the era. Project: 218896