Mapping Project Blue Book
Project Blue Book includes the results of a study of unidentified flying objects conducted by the United States Air Force. The study ran from 1952 through 1969. The study collected 12,618 UFO reports and concluded that there were no indication that any UFO was a threat to national security. A small percentage of reports remained unexplained even after stringent analysis.
This is a map of the unknown, unexplained case files.