A belt of mm blank rounds lies on top of rubble in Grostenquin, France, Jan. 16, 2020. The use of blank rounds added to the realism of Frozen Defender, an exercise designed to test the 435th Security Forces Squadron’s capabilities in a contested environment under harsh conditions. ( Air Force photo by Staff Sgt. Devin Boyer)

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Photo credit: © Operation 2021 / Alamy / Afripics
License: Licensed
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