Those who still lack an identification that complies with the new federal law “may be diverted to a different line, have an extra step,” Kristi Noem says.

The head of Homeland Security said people will still be allowed to fly without compliant ID after this week's REAL ID deadline.

If you're flying in the next few days or weeks, be prepared for potential long lines at the airport as TSA starts taking a closer look at IDs. Driving the news: Wednesday is the first day a Real ID compliant license — or another acceptable document — is needed to board a commercial aircraft in the U.