Soldiers with 1st Battalion, 15th Infantry Regiment, 3rd Heavy Brigade Combat Team, 3rd Infantry Division and attached to an M2/M3 Bradley Fighting Vehicle, hold their security position to allow the armored tanks to conduct sector sketches while setting up camp for the day at the National Training Center iteration 12-05, Fort Irwin, Calif., March 13, 2012. Armored infantrymen mount and dismount from the Bradley vehicles in order to help clear villages, search and destroy enemy forces, and help support the commanding officer's battle plans.