9/11 was a turning point in American history because it had a major effect on our society. Our economy plunged into debt following the attacks. There was no money left for politics and many people increased their drug and alcohol use. The way we travel on airplanes will never be the same. We are subject to severe surveillance before entering onto a plane and subject to harsh carry-on regulations. We may never have a more costly attack ever again. This has shaped our economy and will continue to shape it in years to come.