No need to interview "eyewitnesses".
Eyewitness testimony is totally worthless and not admissible into the Court of Science. So far, there has been not a trace of real evidence that UFOs are anything other than the usual mix of aircraft, balloons, planets, stars, meteors, ..... When somebody comes up with some unambiguous physical cairns from UFOs, I will believe that they are something other than the usual objects that we see in the skies.
