170711-N-PO203-077 ARLINGTON, Va. (July 11, 2017) Richard Schaffer from Lockheed Martin assists Rear Adm. David Hahn, Chief of Naval Research, during a demonstration of the Office of Naval Research (ONR)-sponsored Tactical Decision Kit (TDK) during a visit to ONR. Scheduled to be rolled out over the next several months, TDKs are designed to be employed in barracks where Marines can practice and compete in tactical decision-making on a routine basis. (U.S. Navy photo by John F. Williams/Released)