>> GOOD EVENING. WE BEGIN TONIGHT WITH THAT DANGEROUS AND CHAOTIC SCENE. >> IN OKLAHOMA.GAS LEAKING FROM A TANKER TRUCK. SENDING HUNDREDS FLEEING FOR THEIR LIVES. VIDEO CAPTURING A CLOUD OF TOXIC AND AMMONIA GAS BLANKETING THE CARS IN THIS HOTEL PARKING LOT.PEOPLE NEARBY SAID THEY COULDN'T BREATHE. THE CHEMICALS IN THE GAS, MAKING THEM FEEL LIKE THEY WERE CHOKING. OFFICIALS SAY MORE THAN 60 PEOPLE WERE RUSHED TO THE HOSPITAL.SEVERAL OF THEM AIRLIFTED, SAID TO BE LIFE CRITICAL. OUTSIDE THE HOTEL, EMERGENCY C ...