In 2006, an undercover British agent thwarted the plans of a terror group to blow up planes bound for the U.S. from Britain. The terrorists intended to mix a sports drink with a gel-like substance that could explode when ignited by a cell phone or mp3 player.
So now they take the drink bottles away from all of us, and there's the maximum-three-ounces-of-liquid rule.
But bombs sewn into clothing -- bombs sewn into undergarments, of all things? How far can they take the process of going over the rest of us?
Kip Hawley, head of the TSA during the Bush administration sees only one solution.
"The long term answers -- I don't see any way around it -- are the body scans that will detect whatever you have beneath your clothes," he said.
The worrying thing is being always one step behind.
But that's what happens when you're chasing the imagination of terrorists, which always are looking for the holes and finding them often before we do.