This image was acquired from
wikimedia. It was marked as Public Domain or CC0 and is free to use. To verify, go to the source and check the information there.
Keywords from Image Description:
NORADNorthPortal. Cheyenne Mountain de Nrdlicher Eingang von NORAD im Cheyenne Mountain Originally cheyennemountain af mil via cheyennemountain af mil htm now offline Cropped version available at norad mil via norad mil html Author Information presented on www cheyennemountain af mil is considered public information and may