Side by Side U.S. and Canadian airmen work side-by-side on the operations floor of the Western Air Defense Sector during a visit by Air Force Gen. Terrence O'Shaughnessy, commander of the North American Aerospace Defense Command and U.S. Northern Command, at Joint Base Lewis-McChord, Washington Aug. 23, 2018. SHARE IMAGE: Download Image: Full Size (1.74 MB) Tags: Northern Command, Partnerships Photo By: Air Force Capt. Kimberly Burke VIRIN: 180823-Z-QO338-0004.JPG Photo Gallery