UFOs do exist. They are found in Renaissance art, on ancient coins, etched on cave walls--and even reported in the Bible. Even more surprising is where they are documented most: in times of armed conflict.... Accounts of hovering objects, when war is imminent, reach as far back as 312 A.D. when seen by Roman Emperor Constantine I as he led his troops to battle. They supposedly aided George Washington in winning the American Revolution. UFOs were also...