U.S. Navy sailors from Mobile Diving and Salvage Unit 1 check the manifold of Petty Officer 2nd Class Brody Dorton’s (center) scuba tanks before his dive during a Joint POW/MIA Personnel Accounting Command recovery mission in Quynh Phuong, Vietnam, on May 30, 2010. The mission of Joint Personnel Accounting Command is to achieve the fullest possible accounting of all Americans missing as a result of the nation's past conflicts.