my friend is living here in MD for 3 yrs, got drivers license, but visa xpired wants to go to las vegas, NV?

Answer 1

And so? Flying within the United States you only need your driver's license as ID. If you flew to Canada, Mexico or any place else outside the borders of the United States, they would have to show a passport. Then they might have problems.

Just don't do what the LV ads say, cause if you do something too wild and the police are involved. It will not stay there.