[https://edition.cnn.com/travel/article/air-travel-after-9-11/index.html](https://edition.cnn.com/travel/article/air-travel-after-9-11/index.html) >"The 9/11 terrorist attacks immediately exposed the vulnerabilities in US aviation security. The tough new measures introduced by the end of 2001 would fundamentally change the flying experience in the US and around the world."