ATLANTIC OCEAN (Jan. 11, 2012) Sonar Technician Surface 2nd Class Gareth Erasmus fires the Mk 38 25mm machine gun aboard the guided-missile destroyer USS Porter (DDG 78) during a practice fire exercise. Porter is part of the Enterprise Carrier Strike Group and is underway conducting a composite training unit exercise (COMPTUEX). (U.S. Navy photo by Mass Communication Specialist 3rd Class Jesse L. Gonzalez/Released)
