Mapimí’s Zone of Silence: The Missile Accident That Became an Alien-Station Rumor

On July 11, 1970, a U.S. Air Force Athena test missile left the Green River launch site in Utah. It was supposed to fly toward White Sands in New Mexico, but it went hundreds of miles off course and crashed in the Mapimí desert, near the meeting point of Durango, Chihuahua and Coahuila in Mexico. Its nose cone carried two small cobalt-57 sources, radioactive material used to measure the protective layer around a vehicle returning through the atmosphere.

The United States could not leave the wreck on Mexican soil. A White Sands team flew to Torreón, located the impact point with radiation instruments, dug contaminated sand and negotiated with Mexican officials. Military markings were covered, the transport plan was kept quiet and backup statements were prepared for possible incidents on the road. This was a real recovery operation, not a scene from science fiction.