The Chidlaw Building is a former United States Air Force facility located in the Knob Hill neighborhood of Colorado Springs, Colorado. The building was close to, but not within, the Ent Air Force Base
General Benjamin W. Chidlaw was commander of the Air Defense Command (1951-1955) at Ent Air Force Base and then commander of the Joint Service Continental Air Defense Command (1954-1955), which merged the defense forces of all branches of the military under one command in 1957.[self-published source] CONAD joined with the Royal Canadian Air Force in 1957 to become NORAD.