It was a crazy time, not in the danger from hijackings but the enormous amount of fear and cowardice America built up within itself. It was crazy because of the mass hysteria not the violence. Take this example: 1.2 million Americans died from Covid. 3000 americans died in the twin towers attack. That's 0.25% of the number that died from covid. However we gave up considerably more liberty to defend against the hijackers than we did the virus. It was a very unusual incident but the response wasn't warranted. I mean like 1/3 of the people who died in the twin towers, about 1000 people a year, die from being hit by trains, but you don't see anyone demanding we give up constitutional rights, or do literally anything at all to change that.