HIDALGO, Texas (AP) -- The only person to survive a plunge over Niagara Falls without a safety device has run off and joined the circus. Kirk Jones, 40, planned to make his debut as the "world's greatest stunt man" during a Friday night gig with the Toby Tyler Circus, now touring Texas' Mexican border towns. Last month, the former auto parts salesman from Canton, Mich., jumped over the Canadian side of the falls and somehow emerged from the rushing foam with only a few broken ribs. Jones said circus promoters called him a few days ago and promised him something...