Cheyenne Mountain tunnel construction, Apr 1962.jpg
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| Date/Time | Thumbnail | Dimensions | User | Comment | |
|---|---|---|---|---|---|
| current | 22:05, 31 July 2010 | 1,701 × 1,347 (569 KB) | wikimediacommons>Tdrss | NORAD blast doors, Cheyenne Mountain, Colorado. USAF photo. URL: https://www.cheyennemountain.af.mil {{PD-USGov}} Category:North American Aerospace Defense Command |
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