Firing LIne Marines take cover on the firing line as a mortar round shoots out of the barrel during a training exercise at Camp Lejeune, N.C., June 6, 2016. The Marines, assigned to 1st Battalion, 2nd Marine Regiment, took proficiency training to prepare for their upcoming deployment to support Special-Purpose Marine Air-Ground Task Force. Marine Corps photo by Lance Cpl. Aaron K. Fiala SHARE: Download: Full Size (0.7 MB) Credit: Lance Cpl. Aaron Fiala VIRIN: 160608-M-QO006-0544C.JPG Photo Gallery