<p>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.</p><p>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. </p>