The driver was driving down the expressway and her back tire blew out causing her vehicle to spiral out of control and the vehicle then flipped and started rolling downhill, the vehicle airbags did not deploy in the vehicle at all. The driver and her mother are in critical condition. Yes, the safety of others safety was put at risk. I did contact Ford Manufacturer on her behind of the airbags and they said there is nothing they can do for her with the vehicle being totaled out. But my main problem is why these airbags did not deploy. The vehicle is going to be inspected by her insurance company here in the next few days. There were no prior lamps, messages, or anything that would have indicated that the airbags were defective.