AEGEAN SEA (April 19, 2021) Gas Turbine Systems Technician (Electrical) 3rd Class Joshua Ferdinand does maintenance on a carbon dioxide bottle in a main space aboard the Arleigh Burke-class guided-missile destroyer USS Roosevelt (DDG 80), April 19, 2021. Roosevelt, forward-deployed to Rota, Spain, is on its second patrol in the U.S. 6th Fleet area of operations in support of regional allies and partners and U.S. national security interests in Europe and Africa. (U.S. Navy photo by Mass Communication Specialist 2nd Class Andrea Rumple)