170927-N-UB406-004 IRISH SEA (Sept. 27, 2017) Sailors assigned to the Arleigh Burke-class guided-missile destroyer USS Mitscher (DDG 57) participate in a mass casualty drill on the ship's flight deck. Mitscher is conducting naval operations in the U.S. 6th Fleet area of operations in support of U.S. national security interests in Europe. (U.S. Navy photo by Mass Communication Specialist Seaman Cameron M. Stoner/Released)