150413-N-AT895-101 NATIONAL HARBOR, Md. (April 13, 2015) Chief of Naval Operations (CNO) Adm. Jonathan Greenert answers questions during a Service Chiefs' Update panel at the 50th Anniversary of the Sea-Air-Space Exposition. The Navy League's Sea-Air-Space Exposition was founded in 1965 as a means to bring the U.S. defense industrial base, private-sector U.S. companies and key military decision makers together for an annual innovative, educational, professional and maritime based event. (U.S. Navy photo by Mass Communication Specialist 1st Class Nathan Laird/Released)