HUBBY WAS REAR ENDED BY A CAR GOING 45+ MILES AN HOUR, THE DRIVERS SIDE SEAT BELT DID NOT LOCK IT IS NOW LOCKED IN A FULLY EXTENDED POSITION. AFTER IMPACT, HE SAID THERE WAS SMOKE IN THE CAR FROM WHAT LOOKED LIKE THE AIRBAG SHOULD HAVE INFLATED, BUT DID NOT. HE WAS ALMOST STOPPED FOR A RED LIGHT AND HIT FROM BEHIND. THE SEAT BELT SHOULD HAVE LOCKED TIGHT AND IT DID NOT.