160407-N-PO203-475 PORTLAND, Oregon (Apr. 7, 2016) Dr. Arati Prabhakar, director, Defense Advanced Research Projects Agency (DARPA), breaks a bottle over the bow of Sea Hunter during a christening ceremony for an entirely new class of unmanned ocean-going vessel during a ceremony held in Portland, Oregon. Prabhakar was joined by, from left, The Honorable Robert O. Work, deputy secretary of defense, Rear Adm. Robert Girrier, director, unmanned warfare systems, Rear Adm. Mat Winter, chief of naval research, Scott Littlefield, Anti-Submarine Warfare Continuous Trail Unmanned Vessel (ACTUV) program manager, DARPA, and Roger Krone, chairman and chief executive officer, Leidos. (U.S. Navy photo by John F. Williams/Released)