Gen. Terrence J. O’Shaughnessy, Commander, North American Aerospace Defense Command and U.S. Northern Command provides opening remarks to Deputy Secretary of Defense, David L. Norquist during his visit to the NORAD and USNORTHCOM headquarters on Peterson Air Force Base, Nov. 1, 2019. Secretary Norquist received briefings and held discussions on the commands’ top priority, the defense of North America.