170521-N-BI924-3506 NORFOLK, Va. (May 21, 2017) Chief Mate Matthew Krog of the Military Sealift Command’s dry cargo, ammunition ship USNS Medgar Evers (T-AKE 13), explains the ship's charts to visitors during a public tour in downtown Norfolk. The ship’s port visit was part of Maritime Day, which is held annually to honor the history and sacrifices of civilian mariners. (U.S. Navy photograph by Jennifer Hunt/Released)