150727-N-IC565-030 INDIAN OCEAN (July 27, 2015) Machinist’s

150727-N-IC565-030 INDIAN OCEAN (July 27, 2015) Machinist’s Mate 2nd Class Tanielu Roach conducts a boiler chemistry test on a water sample in the oil lab aboard the Wasp-class amphibious assault ship USS Essex (LHD 2) July 27, 2015. Essex, homeported in San Diego, is conducting naval operations in the U.S. 6th Fleet area of operations in support of U.S. national security interests in Europe and Africa. (U.S. Navy Photo by Mass Communication Specialist 2nd Class Bradley J. Gee/Released)