Video Conference Michael C. Ryan, performing the duties of assistant secretary of defense for international security affairs, discusses NATO and trans-Atlantic security via teleconference during the Brookings Institution's European Union Defense Washington Forum, July 9, 2020. SHARE IMAGE: Download Image: Full Size (0.07 MB) Photo By: Air Force Staff Sgt. Jack Sanders, DOD VIRIN: 200709-D-XI929-001.JPG Photo Gallery