US Navy (USN) CMDR. Jan Delory-Lytle (left) anesthetizes a dental patient with the help of CMDR. Terry Slader, Royal Australian Navy (RAN). Both CMDR's are assigned to the US Military Sealift Command (MSC), Mercy Class Hospital Ship USNS MERCY (T-AH 19), on Jul. 29, 2006, as part of the humanitarian and civic assistance program.(U.S. Navy official photo by Mass Communication SPECIALIST First Class Troy Latham) (Released)