150911-N-AX546-132 BLACK SEA (Sept. 11, 2015) A Ukrainian KA-27 Helicopter lands aboard the guided-missile destroyer USS Donald Cook (DDG 75). Donald Cook is participating in exercise Sea Breeze 2015, an air, land and maritime exercise designed to improve maritime safety, security and stability in the Black Sea. (U.S. Navy photo by Mass Communication Specialist 1st Class Sean Spratt/Released)