U.S. Marine Corps Lance Cpl. Brandon King, a driver with Delta Company, 1st Tank Battalion performs maintenance on an M1 Abrams Tank at Forward Operating Base Shir Ghazay, Afghanistan, April 5, 2013. Gen. John Paxton, the Assistant Commandant of the Marine Corps and other staff conducted a battlefield circulation to FOBs Shukvani, Shir Ghazay, Kajaki, and Delaram to meet with Marines and discuss important issues with key leaders. (U.S. Marine Corps photo by Sgt. Tammy K. Hineline/Released)