200529-N-CY182-0079 ARLINGTON, Va. (May 29, 2020) Rear Adm. David J. Hahn, address the Naval Research Enterprise (NRE) for the final time as the Chief of Naval Research (CNR) during a change of command and retirement ceremony, at the Office of Naval Research (ONR) in Arlington, Virginia, May 29, 2020. Hahn retired May 31, 2020 after 35 years of service in the U.S. Navy. (U.S. Navy photo by Bobby Cummings/Released)