U.S. Marine Corps Staff Sgt. Caleb Hall, assigned to the Mobile Strike Force Team with the II Marine Expeditionary Force Headquarters Group, conducts live-fire training at Camp Leatherneck in Helmand province, Afghanistan, March 2, 2013.
Marines arriving in Afghanistan completed the training to ensure weapon handling proficiency and operational readiness. (DoD photo by Cpl. Alejandro Pena, U.S. Marine Corps/Released). Original public domain image from Flickr