Sightings of unexplained objects at great altitudes and traveling at high speeds in the vicinity of major U.S. defense installations are of such nature that they are not attributable to natural phenomena or known types of aerial vehicles.

— H. Marshall Chadwell
Asst. Director CIA, Scientific Intelligence
Dec 2, 1952

The least improbable explanation is that these things are artificial and controlled… My opinion for some time has been that they have an extraterrestrial origin.

— Maurice Biot
Leading Mathematical Physicist
Apr 7, 1952

Since 1947 we have received and analyzed between 1,000 and 2,000 reports… However there have been a certain percentage of this volume of these reports, that have been made by credible observers of relatively incredible things. We can say that the recent sightings are in no way connected with any secret development by any department by the United States.

— John Samford
Director of Intelligence, Major General US Air Force
Jan 1, 1952