150204-N-PO203-178 WASHINGTON, D.C. (Feb. 4, 2015) Chief of Naval Operations Adm. Jonathan Greenert addresses more than 2700 attendees on opening day of the Naval Future Force Science and Technology (S&T) EXPO. The EXPO is the Office of Naval Research's (ONR) premier S&T event, providing attendees with broad access to ONR research, people and opportunities. (U.S. Navy photo by John F. Williams/Released)