190514-N-JX484-089 BALTIC SEA (May 14, 2019) Sailors participate in a main space fire drill aboard the guided-missile destroyer USS Gravely (DDG 107). Gravely is underway on a scheduled deployment as the flagship of Standing NATO Maritime Group 1 to conduct maritime operations and provide a continuous maritime capability for NATO in the northern Atlantic. (U.S. Navy photo by Mass Communication Specialist 2nd Class Mark Andrew Hays/Released)