Marine Corps SSgt. Kevin Cassara, an instructor for the Advanced Infantry Course, watches over the Marines conducting the steep incline repel event during the Advanced Infantry Course at Kahuku Training Area, Hawaii, April 22, 2021. This course is an experimental proof of concept with the intent of modernizing training and providing squad leaders with new capabilities.

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Photo credit: © Operation 2021 / Alamy / Afripics
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Keywords: fight, prepare, today, tonight