Poolees listen to a class about the Battle of Iwo Jima during a hike aboard Guilford Courthouse National Military Park in Greensboro, N.C., August 10, 2013. The Marines and poolees went on a three-mile hike through the park. They stopped at different memorials where the Marines taught the Poolees about historic Marine Corps battles and witnessed the relief-in-place for the new staff noncommissioned officer in charge of RSS Greensboro. (Official U.S. Marine Corps photo by Sgt. Dwight A. Henderson) (Released)