Real ID could mean real travel headaches

Real ID could mean real travel headaches | CNET News.com

The really ODD thing is that there is no published law requiring a person to show ANY ID to fly from state to state. So why is there not a requirement to show a certain TYPE of ID.

The constitution requires that "full faith and credit" be given to documents of states by "every other state". Shouldn't this apply to the federal government too? Especially since the federal government doesn't issue ID cards it self. One would think it would be required to give full faith and credit to the ID cards issued by each state.