They were one of the worst terrorist groups of all time. The leader and the person that was responsible for 9-11 was Osama Bin Laden. He was very wanted by the US and after the 9-11 attacks he went back to his home country where he could hide and not be found in America. Since he went back to his country the US was forced to go in there and try to find him which would probably start a war. They didn’t care because the US was much bigger than his home country of Pakistan. The Military found him in a home that was barricaded by a huge wall. It was very dark and no one could see so they were just shooting everyone. So when they killed him they didn’t even know.
After 9-11 they wanted to rebuild the places that got destroyed so about a year later they did. Starting with the twin towers. Since the day of 9-11 we have been super protective of terrorist attacks. Mostly they guard the airport the most because of the hijacking that caused it all. The attacks on the twin towers will never be forgotten. So always keep in mind of the people and their families that were injured and died in