WHILE TRAVELING IN MY F150 TRUCK AT 65 MPH(CRUISE CONTROL SET) I WAS TOTALLY BLINDED BY THE SUN AND REAR ENDED A FORD FOCUS. MY WIFE AND I WERE WEARING OUR SEATBELTS. NEITHER AIRBAG DEPLOYED WHICH "WOULD HAVE REDUCED MY WIFE'S INJURIES" (HER PHYSICIAN). THE HOOD OF MY F150 WAS BUCKLED LEADING ME TO BELIEVE THAT THE SENSOR SHOULD HAVE ACTIVATED THE AIRBAG. HOW CAN WE BE CERTAIN, IF THE VEHICLE IS REPAIRED, THAT THE AIRBAGS WILL DEPLOY UNDER SIMILIAR CIRCUMSTANCES?