Two important things came out of 9/11: cockpit doors are closed and locked now, and people fight back against hijackers. In 1968-72 there was a skyjacking every

Two important things came out of 9/11: cockpit doors are closed and locked now, and people fight back against hijackers. In 1968-72 there was a skyjacking every 6 days[0] but they were extortion attempts or plots to get a free flight to Cuba or some such thing. We now think that the endgame of a hijacking is that the hijackers will turn the plane into a suicide bomb, and passengers know NOT to be cooperative. These are real security improvements to air travel. [0] https://en.wikipedia.org/wiki/Aircraft_hijacking#1958–1979 https://en.wikipedia.org/wiki/Aircraft_hijacking#1958–1979