What happened to US after 9/11?

This essay will turn into a powepoint presentation. I Will create the PPT based on the essay. What happen to US after 9/11? What has changed? War, airpot security, WTC, freedom, surveillance, national airspace shut down. the Muslim community, the 911 communication. What happen and how it change this country, and what will never be the same? I have a few sources, of course you need more.