"In 1911 the Navy Department ordered a second board of inquiry after
Congress voted funds for the removal of the wreck of Maine from Havana
Harbor. U.S. Army engineers built a cofferdam around the sunken
battleship, thus exposing it, and giving naval investigators an
opportunity to examine and photograph the wreckage in detail. Finding
the bottom hull plates in the area of the reserve six-inch magazine
bent inward and back"