Inside the North American Aerospace Defense Command and U.S. Northern Command command center at Peterson Air Force Base, Colo., NORAD Air Director Bill Glover, left, and NORAD fighter duty officer Air Force Lt. Col. Jim Robinson, center, monitor missile, space and air events in the NORAD area of responsibility. NORAD has about 25 fighter duty officers, who rotate six-and-a-half-hour shifts in the command center. Photo by Sgt. 1st Class Gail Braymen.
Read the article: NORAD to conduct exercise flights in US, Canada