Former pilot David Fravor described the experience at length after a secret Pentagon program studying UFOs was unveiled.
“…marks one of the most significant disclosures about government research into flying objects — and the so-far-unproven possibility of extraterrestrial aircraft — since Project Blue Book, a lengthy Air Force study of thousands of UFOs that was shut down in 1969. Project Blue Book failed to find “any technological developments or principles beyond the range of present-day scientific knowledge,” and no evidence of any “extraterrestrial vehicles,” according to the Air Force, though a small portion of the events it studied remain unexplained.”
Source: Washington Post