No ID necessary says TSA, IDs to be checked with blacklight

According to TSA spokeswoman Andrea McCauley:

Do you need a photo ID to fly?
No, but you'll undergo "secondary screening," the more involved screening that some passengers find time-consuming and/or invasive. If many passengers arrive without IDs, that would add to wait times, officials said.

Also, the Transportation Security Administration, which has taken over document-ticket screening at U.S. airports, is rolling out small black lights and loupes (magnifying lenses) to 1,300 specially trained screeners who check suspicious IDs in the ticket lines.