U.S. Air Force Honor Guard ceremonial guardsmen perform a seven-man firing party during the final evaluations of training at Langley Air Force Base, Va., Feb. 29, 2016. The 21-gun salute has changed meanings and protocols several times since the 14th century, but today the 21-gun salute is meant to honor the death of a president in the United States. (U.S. Air Force photo by Airman 1st Class Derek Seifert/Released)
<br>Unit: 633rd Air Base Wing
Airman 1st Class Derek Seifert
Taken on 29 February 2016
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