NHTSA Complaint #11448721 — 2001 FORD F-250

Was T-Boned in the passenger side of the truck which changed my direction of travel resulting in hitting a tree head on. Neither frontal air bags deployed. The frontal impact was hard enough to push the tree 18 to 20 inches into the engine compartment bending the frame where the front bumper was attached. The accident resulted in a fatality. I'm just confused why neither air bag deployed. I have had this truck since it was new so I know it's history. There was not any warnings lights on, No air bag warning lights, No modifications were ever done to the truck. All stock. There was never any indication that the air bags were not operating normal. So Why did they malfunction?