The National Museum of the U.S. Navy invites all for an event for an exhibit addition on November 8, 2018.   All Hands:  Abandon Ship! remembers USS San Diego (Armored Cruiser No.6), which sank on July 18, 1918, off Fire Island, New York.   Over the years, conflicting evidence and reasoning for the warship's sinking has been debated.  Naval History and Heritage Command's Underwater Archeology Branch and naval historians will co-host the event.   Following ceremonial ringing of the bells at 11:11 a.m. to commemorate World War I and the initial ribbon cutting ceremony by Director of Naval History and Heritage Command, Rear Admiral Samuel J. Cox, U.S. Navy (Retired), staff will discuss the theories of her loss and the results of the most recent survey on the wreck.   The Underwater Archeology staff will also present rare artifacts such as the U.S. Marine Corps officer's sword not on temporary display.   The artifacts for this exhibit will be included in the museum's current Razzle Dazzle exhibit area, honoring the 100th anniversary of World War I.