Why it matters
The first congressional hearing on UFOs. It led directly to the University of Colorado study and the Condon Report.
Official releases / USUnited States
House Armed Services hearing on UFOs
After the Michigan "swamp gas" sightings, Air Force Secretary Harold Brown and Blue Book adviser J. Allen Hynek answered Congress's questions. Brown said 646 of 10,147 reports since 1947 were still unidentified.