Change
The Change Of The Twin Towers
There were lots of changes but I think these are the most important ones. Airport security became much stricter because they know what you put into your bag and now they don't allow you to take lots of liquids like perfume or medicine and they used to be allowed little pocket knives but now your not and this changed what you can bring and what you cant bring onto an Aircraft .Air-planes have more secure cockpit doors so that you cant hijack the plane. War on terrorist started for America and they targeted Afghanistan and the terrorist. If the government thought you were a terrorist they would put you under 24 hr security like they could put little cameras in your house if they find you or know who your talking to on the phone and what you say and even what you look up on the internet. When the towers fell from the heat of the explosion over 3000 innocent people died including police fire fighters and emergency services.
As I said earlier they can track you down and put you under 24 hr security and put cameras in your house.