A U.S. Air Force A-1 Skyraider, its cowling adorned with a shark's-mouth design, roars to life on a Vietnam flight line as ground crew signal the pilot during engine start. Rugged and heavily armed, the propeller-driven Skyraider remained in frontline USAF service through the Vietnam War, prized for its long loiter time and ability to absorb battle damage while supporting ground troops and downed-airmen rescue operations. Project: 218960