A sketch of an object reported on Aug.31, 1949, over Sacramento, Calif. According to the Project Blue Book report, "Observers sighted an object with short round nose, very short wings rounded at the tips. There was no trail or noise. It appeared as a dark object having a dull gray or silver finish. It was very fast." (Photo: U.S. Air Force via theblackvault.com)

A sketch of an object reported on Aug.31, 1949, over Sacramento, Calif. According to the Project Blue Book report, “Observers sighted an object with short round nose, very short wings rounded at the tips. There was no trail or noise. It appeared as a dark object having a dull gray or silver finish. It was very fast.” (Photo: U.S. Air Force via theblackvault.com)