151117-N-PO203-563 WASHINGTON (Nov. 17, 2015) Dr. Randy Papadopoulos, secretariat historian, Department of the Navy, leads a history panel discussion as part of the Office of Naval Research 75th anniversary commemoration of the Tizard Mission held at the Canadian Embassy in Washington, In 1940, Sir Henry Tizard and a small British delegation brought with them to the United States and Canada plans for more than 20 technologies, including the cavity magnetron, which made possible radars that were both small and powerful. ( Navy photo by John F. Williams/Released)

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