soldier assigned to Bravo Battery, 3rd Battalion, 16th Field Artillery Regiment, 2nd Brigade Combat Team, 1st Cavalry Division, prepares to conduct calibration during Decisive Action Rotation 17-04, at the National Training Center, Fort Irwin, Calif., Feb. 16, 2017. ( Army photo by Spc. Esmeralda Cervantes, Operations Group, National Training Center)

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Photo credit: © AB Forces News Collection / Alamy / Afripics
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