Here's a link to more info on the TSA screening:
http://www.tsa.gov/311/index.shtm
And hey -- be nice to the screeners as you're going through. They're understaffed, seriously underfunded (and thereby sometimes under-trained and under-equipped) and they're the only thing that's actually standing between you and any terrorists who might make it into the country. For all the Washington rhetoric, they're really it. Some of the rules seem silly if you don't know anything about different ways to smuggle weapons on board, but these are some of the few rules I will always advocate following to the letter.
