A U.S. Navy MH-60S Knighthawk helicopter assigned to Helicopter Sea Combat Squadron (HSC) 26 moves cargo from amphibious transport dock ship USS Green Bay (LPD 20), background, to Military Sealift Command dry cargo/ammunition ship USNS Wally Schirra (T-AKE 8) during a vertical replenishment July 17, 2011, in the Persian Gulf. Green Bay was under way supporting maritime security operations and theater security cooperation efforts in the U.S. 5th Fleet area of responsibility.