U.S. Marines check tie downs on CH-46E Sea Knights of Marine Medium Helicopter Squadron 268 (HMM 268) on the flight deck aboard San Antonio-class amphibious transport dock ship USS Anchorage (LPD 23), April 23, 2013. Anchorage was en route to its namesake city of Anchorage, Alaska for its commissioning ceremony May 4. (U.S. Marine Corps Imagery by Lance Cpl. Alexander Quiles 1st MLG Combat Camera/Released)