This is very long, but its very interesting and from reading thru about half of it, I do not see how anyone can be skeptical after reading some of the information contained...What I see thru out, is not only the US Govt, but other nations, have been secretly interested in these things since the 1940s, and according to many of the govt documents/ statements, there are pictures and 'motion pictures' of many of these events!
https://www.governmentattic.org/13do...Catoe_1969.pdf
This is just one paragraph I found curious...
Within the 24-month period following 1947-1948 appearance of UFOs in the region of the South Pole, Argentina, Chile, Australia , F1 Alliance, Great Britain, the United States, Sweden, and the Soviet Union sent expeditions to the Antarctic. Tangible developments were (1) motion and still pictures of disc-shaped objects that circled ships under Chilean commander Orrego; and (2) realization that objects presumably entered earth's atmosphere at polar regions for a reason. On March 2, 1958, telemetry from Explorer satellites confirmed existence of zone of intense radiation -Van Allen belt - encircling earth about 610 miles out from equator. There-is no such belt above either of the polar regions.