A U.S. Air Force Boeing B-52F-70-BW <i>Stratofortress</i> (s/n 57-0162, nicknamed "<a href="https://en.wikipedia.org/wiki/Casper_the_Friendly_Ghost" class="extiw" title="w:Casper the Friendly Ghost">Casper The Friendly Ghost</a>") from the 320th Bomb Wing dropping Mk 117 750 lb (340 kg) bombs over Vietnam. This aircraft was the first B-52F used to test conventional bombing in 1964, and later dropped the 50,000th bomb of the "Arc Light" campaign. B-52Fs could carry 51 bombs and served in Vietnam from June 1965 to April 1966 when they were replaced by "Big Belly" B-52Ds which could carry 108 bombs.
USAF
circa 1960's
U.S. Air Force photo <a rel="nofollow" class="external text" href="http://www.af.mil/News/Photos.aspx?igphoto=2000593144">020926-O-9999G-001</a> from the <a rel="nofollow" class="external text" href="http://www.af.mil/News/Photos.aspx">USAF website</a>