Answer:
9/11 was an example of conflict and cooperation, before 9/11 there was no TSA or any airport security like we have it today. 9/11 has taught many countries to have TSA or something like it. Some countries have racial profiling to prevent things like that to happen again. It also made the USA go into a war and steal oil, but the troops are mostly back now. It also made the world fear Isalm.
Step-by-step explanation: