There have been rumors for decades that Uncle Sam has a crashed flying saucer or two hidden away in some secret place, but no civilian has ever gotten his or her hands on one.
With probably millions of people around the world having seen UFOs since the 1940s, you would think there would be wrecked flying saucers all over the planet. But when was the last time you saw a UFO sitting beside a road, waiting for a tow truck?
When you think of it, that is a good argument for those who believe UFOs come from some place other than Earth. If UFOs were manufactured here on Earth, they'd fall apart the day their warranties expired and we'd have UFO junkyards all over the planet.