150608-N-HX127-105 BALTIC SEA (June 08, 2015) NATO ships are underway in formation during the opening movements of BALTOPS 2015. BALTOPS is an annual multinational exercise designed to enhance flexibility and interoperability, as well as demonstrate resolve among allied and partner forces to defend the Baltic region. (U.S. Navy photo by Mass Communications Specialist 3rd Class Timothy M. Ahearn/Released)