2002 CHEVY VENTURE VAN WITH TWO FRONT, AND TWO SIDE AIR IMPACT BAGS. DRIVERS SIDE OF VAN WAS T-BONED ACCROSS THE ENTIRE SIDE OF THE VAN AND THE SIDE IMPACT BAG DID NOT GO OFF. THE VAN WAS HIT BY A HUGE BRIGADIER DUMP TRUCK LEAVING FROM A STOP SIGN. THE VAN WAS TOTALED. WHY DIDN'T THE AIR BAG GO OFF? ACCIDENT WAS ON 11/20/02.