As we look to the 20-year anniversary of the attacks on 9/11 there is a whole generation who has no idea how travel changed after the attack on the World Trade Center towers in New York.

The biggest change was the creation of the TSA or Transportation Security Administration which appeared at airports across the nation two months after September 11, 2001.

Three months after the attacks, Richard Reid attempted to board a plane with explosives in his shoes, this ushered in the no shoes are belts as you enter security. Liquids of more than 3.4 ounces also couldn’t go through airport security.

Of course, all the new additions for security have resulted in longer lives, no gate send-offs, airline consolidations, and a greater appreciation of air travel.

What has been the biggest change about travel for you since the 9/11 attacks?