Army Spc. Aly Martinez, Naval Medical Research Unit-San Antonio animal care specialist, uses a bell to signal the arrival of the official party at the NAMRU-SA change of command ceremony at Brooke Army Medical Center, Joint Base San Antonio-Fort Sam Houston, Texas May 21, 2021. In Navy tradition the bell aboard a ship is rung to declare the changing of the watch but currently it is also used to announce the arrival and departure of visiting dignitaries.

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Photo credit: © Operation 2021 / Alamy / Afripics
License: Licensed
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Keywords: change, command, commander, medical, navy, research