CONSUMER FELT A VIBRATION IN FRONT END OF VEHICLE BUT BEFORE HE COULD SLOW DOWN THE RIGHT FRONT TIRE BLEW OUT CAUSING HIM TO LOOSE CONTROL OF THE VEHICLE, HIT THE MEDIAN AND ROLLED OVER 3 TIMES. THE RIGHT FRONT TIRE APPEARS TO HAVE SEPARATED, THE OTHERS WENT FLAT ON IMPACT(FIRESTONE ATX P235/75R15). NLM