For anyone who was young on 9-11, it’s hard to remember what being at an airport was like without TSA agents and security checkpoints. Once upon a time, you could get to your gate without having to show an ID or boarding pass. You could bring full size shampoo in your carry-on. You didn’t have to empty your water bottle. Your laptop could stay in your bag and your shoes could stay on your feet. That all changed with the implementation of the Aviation and Transportation Security Act following the September 11, 2001 terror attacks.