Most would be led to think every U.F.O. that's witnessed is the product of a distant alien. I believed this for a while until I started looking into the proof that humans have been creating flying saucers since world war one. In recent times, dating back to the 1940s and 1950s, humans have patented "vertical take-off and landing"(VTOL) aircraft. These are circular-winged aircraft built to move with reflex in any direction: up, down, forward, backward, left, right and diag