The distinctive cloud of smoke seen here was a familiar sight on Southeast Asian flight lines as A-1 Skyraider radial engines roared to life before another combat sortie. This aircraft, nicknamed 'Wabash Cannonball' and numbered 619, represents the rugged workhorses flown by Air Force Air Commando and Special Operations squadrons throughout the Vietnam War, supported on the ground by dedicated crew chiefs and maintenance personnel. Project: 218942