Photo of by Tomoharu Mizuno (snowman) djwerdna on flickr; Mizuno finished in 6:25:34 The marathon is the city's most lucrative single-day sporting event; this year, the marathon will bring in an estimated $220 million to city businesses. Blind marathoner Henry Wanyoike ran the course in 2 hours, 52 minutes, and 18 seconds. The NY Sun reports that Wanyoike, who is blind from a stroke, runs " tethered by a rope to his partner, Joseph......