150508-N-AT895-582 WASHINGTON (May 8, 2015) Military guests including Chairman of the Joint Chiefs of Staff (CJCS) Gen. Martin Dempsey, Chief of Naval Operations (CNO) Adm. Jonathan Greenert, and members of the USO reunion tour take part in a salute to service members at the Washington Nationals Navy Appreciation Day game. (U.S. Navy photo by Mass Communication Specialist 1st Class Nathan Laird/Released)