Answer:
The 9/11 attack was an intentional plane crash made by a terrorist group. Part of the reason why they attacked was because they were Middle Eastern and the US had troops there. They wanted them out, but the US refused. 9/11 is a symbolic date to the attackers, who were Muslim. That day, they crashed two planes into the Twin Towers. A plane also crashed into the Pentagon. People also landed (crashed) a plane heading for Washington D.C into a field because they were afraid it would be the next plane to crash into a building, namely the White House. Nearly 3000 people died and it took 100 days to clean up the mess. It was the deadliest terrorist attack ever.
Step-by-step explanation: