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divergent interpretations of some of the cases in this report, we suggest two books which present the skeptical position:
*Flying Saucers and the U.S. Air Force*, Lt. Col. Lawrence J. Tacker, (Van Nostrand, 1960).
*The World of Flying Saucers*, Dr. Donald H. Menzel, (Doubleday, 1963).
Both books argue that UFOs have been adequately investigated, and that there is no evidence indicating they are anything other than misidentified conventional objects or phenomena.
This report contains a total of 746 UFO sightings. The main chronology [Section XI] lists 575 cases, with cross-references. (Statistics based on the main chronology are reported in Section XII) The witnesses in 50% of these cases were trained or experienced observers. An additional 171 cases are included in separate chronologies [Section XII] which show the major concentrations of UFO sightings.
The reports come from 46 states, the District of Columbia, Puerto Rico, Canada, Mexico and Central America, 6 South American countries, 10 European countries, 4 African countries, 5 Asian countries, Australia and New Zealand, major oceans and numerous islands.
States with the highest frequency of sightings, as indicated by the selective process used, were: (1) California; (2) Ohio; (3) New Mexico; (4) Florida; (5) Illinois.
Other countries: (1) England; (2) France; (3) Canada; (4) Japan; (5) Brazil.
Of the 575 cases, two UFOs were observed in 41 cases, three UFOs in 30 cases, more than three UFOs in 81 cases. The remainder were observations of single objects.
Richard Hall
Washington, D. C.
May 1964
Approved For Release 2001/04/02 : CIA-RDP81R00560R000100010001-0