MY FORD EXPEDITION WAS REAR ENDED BY A LARGE GARBAGE TRUCK. MY AIR BAG DID NOT DEPLOY AT THAT HIT. MY TRUCK WENT INTO A SPIN AND HIT ANOTHER VEHICLE WITH THE FRONT AND DRIVER SIDE AND AGAIN THE AIRBAG DID NOT DEPLOY. I SUSTAINED BROKEN RIBS, BLACK EYE, BRUISED JAW, AND BRUISED TAILBONE. WHY DIDN'T MY AIRBAG GO OFF TO ALLEVIATE THE INJURIES TO ME? *NM