190611-N-QR145-032 NORTH SEA (June 11, 2019) - Hull Maintenance Technician Fireman Recruit Adam Ralls uses a thermal imager during a main space fire drill aboard the Arleigh Burke-class guided-missile destroyer USS Ross (DDG 71) in the North Sea, June 11, 2019. Ross, forward-deployed to Rota, Spain, is on its eighth patrol in the U.S. 6th Fleet area of operations in support of U.S. national security interests in Europe and Africa. (U.S. Navy photo by Mass Communication Specialist 2nd Class Krystina Coffey/Released)