Two people are dead and another is fighting for her life in hospital after a head-on crash in Mapleton.  Wellington County OPP says an SUV and a Jeep crashed on County Road 12 near County Road 45 on Friday afternoon.  A 74-year-old man from St. Marys and a 38-year-old man from Arthur were both killed in the crash.  A woman from St. Marys was airlifted to hospital in critical, but stable condition.  Police are looking to speak to any witnesses.