190324-N-DA737-0113 KETCHIKAN, Alaska (March 24, 2019) Visitors line up along the pier for a tour of the guided-missile destroyer USS Zumwalt (DDG 1000). Zumwalt is conducting the port visit as part of its routine underway operations in the eastern Pacific. Zumwalt-class destroyers provide the Navy with agile military advantages at sea and with ground forces ashore. (U.S. Navy photo by Mass Communications Specialist 2nd Class Jonathan Jiang/Released)