VEHICLE WAS INVOLVED IN AN SERIOUS OFFSET HEAD ON CRASH WITH A FULL SIZE CHEVROLET SILVERADO. THE SIDE APRON AIR BAG FAILED TO DEPLOY ON BOTH SIDES. BOTH VEHICLES WERE TRAVELING STRAIGHT ON A TWO LANE RURAL ROAD WITH A SPEED LIMIT OF 45MPH. DON'T KNOW ACTUAL VEHICLE SPEEDS. CHEVROLET VEERED INTO THE OPPOSITE LANE AND STRUCK THE MITSUBISHI RAIDER XLS TRAVELING IN THE OPPOSITE DIRECTION. I BELIEVE THE FAILURE OF THE DRIVER SIDE CURTAIN AIRBAG CONTRIBUTED TO THE SERIOUSNESS OF THE MITSUBISHI DRIVERS INJURIES.