160617-N-VG727-163 BATH, Maine (June 17, 2016) Lt. j.g. Christopher Hevey and Damage Controlman Chief Christopher Langtry seal the mast step box of guided-missile destroyer USS Michael Monsoor (DDG 1001) in the General Dynamics Bath Iron Works shipyard. Mast stepping is a traditional ceremony before a ship is commissioned that originates from the age of sail when Sailors placed coins under masts for good luck and safe voyages. (U.S. Navy photo by Mass Communication Specialist 3rd Class William Collins III/Released)