A 24-year-old Columbia University student studying late at the library Friday evening is in critical condition at St. Luke's Hospital in Manhattan after his bid to escape a pair of muggers ended in serious injury under the wheels of a Jeep. According to WABC News, the student had just left the library on Columbia's Morningside Heights campus and was waiting for a bus around 9 p.m., when he was approached by two young men. It's......