Photo of the North American Aerospace Defense Command and U.S. Northern Command Headquarters building on Peterson Air Force Base, Colorado. (DoD illustration by Lewis Carlyle)
An F- 22 Raptor takes flight as part of Polar Force 19-4 at Joint Base Elmendorf-Richardson, Alaska, April 2, 2019. (U.S. Air Force photo by Airman 1st Class Jonathan Valdes Montijo)