Back in the 1960s I was assigned to Air Force Office of Scientific Research. AFOSR was directed to support a study of the UFO phenomenon. That meant that someone on the staff would be put in charge the study. The Director told me I had been considered for that post, but the choice went to another of our scientists. I replied that it was just as well, since I already thought they were extraterrestrial, and wasn't sure I could be objective in running the study.
The study examined all the major cases, but ultimately came to no conclusion.