Marine Corps 1st Lt. James Koehler left, an infantry officer, directs Lance Cpl. James Driscoll, a gunman, both with Regimental Surveillance and Target Acquisition Company (RSTAC), 1st Marine Division, during a live fire drill at Fort Irwin, Calif., Oct. 3, 2017. RSTAC is an experimental company designed to build proficiency in scout sniper operations for service level exercises. ( Marine Corps photo by Lance Cpl. Alexa M. Hernandez)

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Keywords: 1st, field, fort, irwin, mardiv, marines, operations, rstac, sniperfex, snipers, training, urban