A U.S. Air Force A-1 Skyraider sits armed and ready in a protective revetment during the Vietnam War. Loaded with rocket pods and a centerline fuel tank, the aircraft carries a placard reading 'ALERT AIRCRAFT COCKED,' signifying it was prepared for immediate scramble to support ground troops in contact with the enemy. Rugged and heavily armed, the propeller-driven Skyraider remained a mainstay of close air support and search-and-rescue escort missions throughout the conflict. Project: 218965