160418-N-TC720-220 BALTIC SEA (April 18, 2016) - A Lithuanian pilot boat approaches USS Donald Cook (DDG 75) to collect the Lithuanian pilots who helped the ship get underway from Klaipeda, Lithuania, April 18, 2016. Donald Cook, an Arleigh Burke-class guided-missile destroyer, forward deployed to Rota, Spain is conducting a routine patrol in the U.S. 6th Fleet area of operations in support of U.S. national security interests in Europe. (U.S. Navy photo by Mass Communication Specialist 2nd Class Mat Murch/Released)