What things that are different now and before 911?

Since 9/11, significant changes have occurred in security protocols, particularly in air travel, where enhanced screening measures and the implementation of the Transportation Security Administration (TSA) have become standard. Additionally, there has been a notable increase in surveillance and data collection by governments to combat terrorism, impacting privacy rights. The event also shifted U.S. foreign policy, leading to prolonged military engagements in the Middle East and heightened national security legislation. Overall, the landscape of security, civil liberties, and international relations has been profoundly altered.