On July 11, 1947, Twin Falls, Idaho, buzzed with excitement when a 30-inch disc was discovered in a local yard. Initially dismissed as a truck noise, the object was found by a neighbor who contacted the police. The authorities, along with FBI and military intelligence, swiftly took control, flying in officers from Fort Douglas and imposing secrecy over the investigation.

The next day, the FBI handed the disc over to the Army. Nationally, it was soon revealed as a hoax, crafted by four local teenagers.