Just a note:

As many of you know, we (TSA) have started using the UV lights at basically all airports now. Along with that, we've received some training in acceptable documentation. They're still not clear on a lot of things, which I don't like, but here's what it seems to boil down to:

US Driver's License or State ID card
US Passport
US Federal Government ID card
Canadian drivers license (since passport is not required to travel over the border)
Foreign country passport (certain "suspect" countries could require additional screening)

We've been told not to accept foreign country's driver's licenses as a primary form of ID, mostly because of the vast number of them, and the difficulty of determining if it's valid, or the security of the process which goes into obtaining the ID.

Now, whether it should be our job to check IDs or not, is a discussion for a different thread, but currently we are and we're just doing our best to try and make sure we check for valid, secure IDs.