Marines attached to Advanced Infantry Training Battalion, School of Infantry-East (SOI-E), prepare to fire their M4A1 carbine during a combined arms exercise at Camp Lejeune, , April 7, 2017. The mission of SOI-E is to train entry-level and advanced level Marines in the skills required of an Infantry Marine for the operating forces.

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Photo credit: © Chuck Little / Alamy / Afripics
License: Licensed
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