150706-N-TW634-051 INDIAN OCEAN (July 6, 2015) Engineman 2nd Class Mingtoussou Kerim, from Washington, D.C., pours engine oil into the viscometer of an oil testing kit to measure viscosity on board the amphibious transport dock ship USS Green Bay (LPD 20). Green Bay is assigned to the Bonhomme Richard Expeditionary Strike Group and is on patrol in the U.S. 7th Fleet area of operations. (U.S. Navy photo by Mass Communication Specialist 3rd Class Derek A. Harkins/Released)