A U.S. Sailor assigned to Riverine Squadron (RIVRON) 2, mans a .50-caliber machine gun aboard a Riverine Command Boat off the coast of Virginia, March 13, 2012, during a live-fire exercise.
RIVRON 2 is conducting unit level training in order to certify for upcoming deployments. (DoD photo by Petty Officer 2nd Class Paul D. Williams, U.S. Navy) Original public domain image from Flickr