Imagine crossing Times Square on a high wire between skyscrapers, 25 stories above the pavement. This was a reality Sunday for two siblings from the famed Flying Wallendas circus family. Nik Wallenda is a seventh-generation acrobat, but this time, he was nervous. His sister, Lijana Wallenda, joined him for the first time since her near-fatal accident in 2017, when she broke nearly every bone in her face