It’s been more than a century since anyone has crossed the Niagara Gorge on a high wire, but a new chapter in the daredevil tradition that put Niagara Falls on the world’s tourism map, is about to be written. Famed American aerialist Nik Wallenda will attempt a dramatic crossing over the Niagara River between Niagara Falls, New York and Niagara Falls, Ontario on a tightrope,...