150919-N-PO203-122 PATUXENT RIVER, Maryland (Sept. 19, 2015) Jack Harris from the Space and Naval Warfare Systems Center Pacific, retrieves a Mk 18 Mod 2 Small Synthetic Aperture Minehunter (SSAM) unmanned undersea vehicle (UUV) while underway during the Office of Naval Research-sponsored demonstration at Naval Air Station Patuxent River, Md. The event, PAX River 2015, brought together 150 participants, 26 technology teams and unmanned systems to jointly explore UUV technologies in common, at-sea environments. (U.S. Navy photo by John F. Williams/Released)