A joint Navy and Marine Corps color guard display the colors during the ceremonial commissioning of USS Arlington (LPD-24) at Naval Station Norfolk, in Norfolk, Va., April 6, 2013. The Arlington is a San Antonio-class amphibious transport dock and is named in commemoration of the September 11, 2001 terrorist attacks. (U.S. Marine Corps photo by Sgt. Mallory S. VanderSchans HQMC Combat Camera/Released)