I HAVE A 2007 FORD FUSION SEL V6. THE CAR HAD 87,000 MILES. IT WAS ON THE WAY TO WORK IN THE MORNING. THE CAR IN FRONT OF ME SLOWED DOWN SO I WAS SLOWING DOWN TOO. MY FOOT WAS ON THE BRAKE PADDLE ALL THE TIME AT THAT MOMENT. THE SPEED SLOWED DOWN FROM ABOUT 35 MPH TO ABOUT 20-25 MPH. THEN IT FELT SUDDENLY NOT WORKING. I TRIED TO PRESS THE BRAKE HARDER BUT DID NOT WORK. THE ABS DIDN'T WORK EITHER. THERE WAS NO BRAKING SOUND OR MARK ON THE ROAD. THE CAR WOULDN'T STOP. I REAR ENDED THE CAR IN FRONT OF ME. WATCHED THE AIRBAG DEPLOYED. AFTER THE CRASH, THE CAR KEPT MOVING FORWARD WHILE THE FRONT CAR PULLED FORWARD. I USED THE EMERGENCY BRAKE TO STOP THE CAR BEFORE MOVING THE SHAFT TO PARK POSITION AND TURNING THE CAR OFF.