Army Sgt. 1st Class Steven Cassidy puts on personal protective gear during the Contract Operational Readiness Exercise 21 (CORE-21) on Camp Bullis, San Antonio, Texas on April 20, 2021. The CORE-21 also incorporates weapons qualification, land navigation and other ancillary training.

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Photo credit: © Operation 2021 / Alamy / Afripics
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Keywords: army, bullis, camp, command, contact, core-21, react, reserve, sustainment, tasks, training, warrior