Lance Cpl. Gerald Potempa (right) and Lance Cpl. Brent Madison (left), mortar men with 2/24 Battalion, 23rd Marine Regiment, 4th Marine Division, Marine Forces Reserve, fire the 81 mm gun during a fire support coordination exercise at Camp Atterbury, Ind., April 14, 2016. The Marines coordinated with forward observers to provide suppressive fire with mortars while aviation assets, provided by air national guard units, destroyed the target.