In the showdown with the federal government over making state-issued driver's licenses more secure, all but three states have won a reprieve from more extensive security screenings for their residents at airports and federal buildings that were set to begin May 11.

While 47 states got more time to comply with new federal requirements through extensions, Maine, New Hampshire and South Carolina didn't, and their residents may be in for extra frisking before boarding airplanes if their states continue to balk at enforcing Real ID, the 2005 federal law aimed at keeping driver's licenses out of the hands of terrorists.