U.S. Marine Corps Lance Cpl. Dave Rattigan, field artillery cannoneer, with Kilo Battery, 1st Battalion, 10th Marine Regiment (1/10), adjusts the optics on a M198 155 mm howitzer before conducting a fire mission is support of the 2nd Marine Divisions Command Post Exercise (CPX) at Gun Post 26, Camp Lejeune, N.C., March 6, 2014. The CPX is designed to strengthen the 2nd Marine Divisions unit cohesion and combat effectiveness for future operations.