A U.S. Navy petty officer first class, selected for promotion to chief petty officer, balances as he transits an obstacle course during the San Diego Chief Petty Officer Legacy Academy at Naval Base Coronado, Calif., Aug. 22, 2013. The academy was a six-day course during which the Sailors lived aboard the USS Midway Museum while learning the history of the Navy and chief petty officer community, as well as participating in preservation activities, leadership training and community relations projects.