U.S. Navy Aviation Structural Mechanic 3rd Class Katie J. Heninger, left, and Aviation Structural Mechanic 2nd Class Christopher Helmkamp, both assigned to Helicopter Sea Combat Squadron (HSC) 9, install the tail landing gear on an MH-60S Seahawk helicopter in the hangar bay of the aircraft carrier USS George H. W. Bush (CVN 77) in the Atlantic Ocean Oct. 17, 2010. The George H. W. Bush Carrier Strike Group is under way conducting a tailored ship's training availability/final evaluation problem.