U.S. Navy Gunner's Mate 3rd Class Joshua Smith fires a .50-caliber machine gun during a live-fire exercise aboard the aircraft carrier USS Harry S. Truman (CVN 75) in the Atlantic Ocean Jan. 23, 2013.
The Harry S. Truman was under way conducting a composite training unit exercise in preparation for its upcoming deployment. (DoD photo by Mass Communication Specialist 3rd Class Billy Ho, U.S. Navy) Original public domain image from Flickr