What is airport security screening like in a post-9/11 world?

After the events of 9/11 revealed weaknesses in the security screening system, the US enacted legislation to overhaul it.

Since 9/11, passenger and baggage security has evolved along with new information, technology, and threats. Shoes must be removed because of an attempted “shoe bombing” in 2001, full-body scanners increased in use following an attempted “underwear bombing” in 2009, and liquids are severely restricted because of a foiled 2006 transatlantic bombing plot involving liquid explosives. (The US initially banned all carry-on liquids, but soon loosened restrictions to what they are today.)

Modifications to the passenger and baggage screening process were not the only significant security changes made to US air travel following 9/11. Numerous behind-the-scenes actions have been taken to protect the airport, airlines, and passengers. For example,

📬 Sign up for the Daily Brief

Our free, fast, and fun briefing on the global economy, delivered every weekday morning.