Screen Shot 2015-02-20 at 21.55.41 Published on February 20, 2015 in 12 March 1967Full resolution (413 × 324) ← Previous Next → SGT Donald F. Clements and A1C Greg E. Sniegowski load 1,200 20mm cannon shells into a SUU-23 gun pod at Phu Cat Air Base, South Vietnam. (U.S. Air Force)