A two vehicle crash near the intersection of Tabor Loop and 127 North around 8:30 tonight has sent at least two patients to the hospital by medical helicopter, one to U.T. the other to Erlanger.  Witnesses said the crash appeared to be a head on collision with one vehicle on fire and the other flipped over on its top.  Traffic has been diverted for quite a while and just now (9:39) is moving slowly.