|>>|| No. 4810
The American defence establishment deliberately cultivates UFO conspiracies, because it provides them with a very useful supply of disinformation.
Area 51 is a real military site, more properly known as Edwards Air Force Base. We don't know what the site is currently used for, but historically it was used as the test base for the most secret aircraft development projects including the U-2, A-12 and F-117 reconnaissance aircraft. You can't really hide a supersonic aircraft, but you can muddy the waters by spinning a load of yarns about flying saucers and feeding tit-bits of nonsense to vocal lunatics. Information gleaned from sightings of your super-secret spy aircraft will be lost in a tidal wave of nonsense, hugely reducing the usefulness of that information to foreign adversaries.
This chap may genuinely have information on alien activity, he may have gone bonkers in his old age, or he may be knowingly telling porkies. If you run a top-secret military research establishment, it would be very convenient if some of your ex-employees said that they spent their days dismantling flying saucers.