160229-N-IK959-818 GREAT LAKES, Ill. (Feb. 29, 2016) A Sailor escorts Vice Adm. Jin-Sup Jung, the Republic of Korea (ROK) Navy commander of Naval Education and Training, through a simulated missile-damaged berthing compartment on the U. S. Navy’s largest simulator, USS Trayer (BST 21), a 210-foot-long Arleigh Burke-class destroyer replica, where recruits go through Battle Stations, a grueling 12-hour culmination of basic training and the last evolution recruits accomplish before they graduate. (U. S. Navy photo by Scott A. Thornbloom/Released)