U.S. Marines attending Infantry Squad Leaders Course (ISLC), School of Infantry, West, are hiking to establish a defensive position on the Army's Kahuku Training Area, Hawaii, Aug. 30, 2011.The mission of ISLC is to train infantrymen to be able to take charge of Marines in a combat environment. (U.S. Marine Corps photo by Lance Cpl. Demetrius Munnerlyn/Released) - U.S. Marines attending Infantry Squad Leaders Course (ISLC), School of Infantry, West, are hiking to establish a defensive position on the Army's Kahuku Training Area, Hawaii, Aug. 30, 2011.The mission of ISLC is to train infantrymen to be able to take charge of Marines in a combat environment. (U.S. Marine Corps photo by Lance Cpl. Demetrius Munnerlyn/Released)