My brother and I saw a UFO one day while we were fishing in the Kentucky River back in the early 1960's, mid-day, probably 300 feet in the air. That thing looked to be about 100 feet in diameter, silver colored and made no noise, had no lights or ports whatsoever. We sat and watched it for at least five minutes, then it took off so fast it was almost like it had just vanished, still no sound at all, no wind blast, nothing, just one second it was there, the next second, it was just a dot going over the far ridges.
Soon after that, the Air Force started flying large jets low level over the area for a couple of months almost daily, but the newspaper wrote that they were just checking out radar coverage for a new system upgrade.
Now whenever we talk about that day, we both laugh and say we came close to be abducted or "probed!", but we were two scared witless kids just sitting on the riverbank watching that thing and wondering what it was going to do. That was/is a very rural area, very few folks around and we never found anyone else that saw, or would admit to, seeing anything like that.