150920-N-PO203-074 PATUXENT RIVER, Maryland (Sept. 20, 2015) Researchers from the University of Texas at Austin launch a REMUS 600 autonomous underwater vehicle (AUV) during the Office of Naval Research-sponsored demonstration of unmanned undersea vehicles (UUV) at Naval Air Station Patuxent River, Md. The event, PAX River 2015, brings 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)