Three people were critically injured Saturday morning when a driver fell asleep behind the wheel and slammed head-on into another car. The slumbering driver, Austin Hensley, 23, of Rickman and his passenger, Gillermo Correa, 48, of Sparta were airlifted to Erlanger Medical Center in Chattanooga along with the driver of the other vehicle, Patricia Finney, 50, of Manchester. The accident happened around 8 a.m. Saturday a few hundred yards past the South Mill Street intersection on Highway 55 (Manchester Highway) in Morrison.