I don't think they need to make any safety changes.

I mean, if you wanted that to be 100% safe, you'd put a prius with a roll cage and restrictor plates on the drag strip. Those are large hunks of metal moving and accelerating very fast, stuff happens.

Sounds like one random piece hit someone. While tragic, the only way that the same thing could be prevented would be to remove everyone from the stands and around the entire track. If a bolt came off at high speed, just right, it could get through the fence between the people and the track and kill someone. Unlikely, but it could happen.

Just a freak accident.