1961 Press Photo Flags fly at entrance to NORAD underground complex in Colorado

International Mountain - This granite outcropping, a part of the Colorado Rockies, is a mountain with international import. Flags of Canada and the United States, the two partner nations in the North American Air Defense Command, fly in front of the rugged face of Cheyenne Mountain; and on the inside, Canadians and Americans work at the job of defending both countries against aerospace attack. In one of the 11 steel buildings of the underground complex near Colorado Springs is the NORAD Combat Operations Center, the command post for continental aerospace defense. More than 900 people spend an eight-hour shift every day inside the mountain where daylight is a third of a mile down the tunnel or 1,400 feet straight up. US Air Force. Flags fly at entrance to NORAD underground complex in Colorado

Photo is dated 1961.

Photo measures 10 x 8.25 inches.