Why do we constantly forget history? There was a significant period of time, before 1970 or so, during which there were NO federal controls on bringing guns aboard planes and we had very few problems. There was at least one case where a pilot with a gun stopped a hijacker with a gun before Federal controls were put on. When the hijackings started, we had a choice, try to disarm everyone, or use contervailing force against hijackers. We took the route to restrict freedoms and it has failed spectacularly. Now lots of people who can't learn are saying that we need more of the same.
Life is not safe. The idea that it can be is one of the basic fallacies of the totalitarians. The death rate is the same everywhere: one per person.