150418-N-WO404-345 SAN DIEGO (April 18, 2015) Aviation Ordnanceman 2nd Class Christopher Copeland, from Detroit, fires a newly installed MK 38 Mod 2 machine gun aboard the aircraft carrier USS Ronald Reagan (CVN 76). Ronald Reagan is underway conducting sea trials after successful completion of a planned incremental availability maintenance period. (U.S. Navy photo by Mass Communication Specialist 3rd Class Jonathan Nelson/Released)