151117-N-PO203-698 WASHINGTON (Nov. 17, 2015) Rear Adm. Mat Winter, chief of naval research, is joined by Dr. Marc Fortin, left, assistant deputy minister (science and technology), Canadian department of national defence, and Mr. Roland Knott, British Head, defence science and technology strategy, as they sign a renewal of commitment during the 75th anniversary commemoration of the Tizard Mission. 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, most importantly the cavity magnetron, which made possible radars that were both small and powerful. (U.S. Navy photo by John F. Williams/Released)