On the hot flight line at Phu Cat Air Base, U.S. Air Force Airmen 2nd Class Francis Branch (left) and John Sellung remove a 20 mm M39 cannon from a North American F-100D <i>Super Sabre</i> of the 416th Tactical Fighter Squadron, 37th Tactical Fighter Wing, in October 1967.
USAF
1967-10
<a rel="nofollow" class="external text" href="http://www.nationalmuseum.af.mil/photos/index.asp">National Museum of the U.S. Air Force</a> photo <a rel="nofollow" class="external text" href="http://www.nationalmuseum.af.mil/shared/media/photodb/photos/2013%5C06%5C130605-F-DW547-015.jpg">130605-F-DW547-015</a>