150106-N-ZZ999-021 SAN DIEGO (Jan. 6, 2015) The Military Sealift Command hospital ship USNS Mercy (T-AH 19) departs Naval Station San Diego to conduct Mercy Exercise 02-15. The quarterly exercise trains and integrates medical and other core Navy personnel to operate the ship as a medical treatment facility. Upon the completion of Mercy Exercise, Mercy will enter into a scheduled maintenance period. (U.S. Navy photo by Mass Communication Specialist Seaman Chelsea Troy Milburn/Released)