A U.S. Navy aviation ordnanceman loads the fuselage .50 caliber machineguns of a Brewster F2A <i>Buffalo</i> fighter with ammunition, at Naval Air Station Miami, Florida (USA), 9 April 1943. The F2A was then in use as a training aircraft. Note 3:1 ratio of black-tipped armor-piercing ammunition to red-tipped tracer ammunition.
USN; uncropped version uploaded by <a href="https://en.wikipedia.org/wiki/User:Felix_c" class="extiw" title="en:User:Felix c">Felix c</a> at <a class="external text" href="https://en.wikipedia.org">en.wikipedia</a>, Date (original upload date)
Official U.S. Navy Photograph <a rel="nofollow" class="external text" href="http://www.history.navy.mil/photos/images/k00001/k00691c.htm">80-G-K-691</a>, now in the collections of the National Archives.