One person is in critical condition in Calgary hospital after a semi rollover in the Rogers Pass Friday night.  It happened just before seven o'clock on the Trans-Canada Highway between Revelstoke and Golden.  The trailer was on a trip from Winnipeg to Delta, BC when it rolled over at a sharp turn.  The driver of the tractor trailer had to be airlifted to Calgary hospital while a second person was taken to hospital in Golden with non-life threatening injuries.  Investigators are looking into whether speed, driver inattention, inexperience or load configuration played any part in the crash.