Keep Your Shoes On, T.S.A. Tells Some Fliers The Transportation Security Administration recently put into effect new screening procedures that make boarding easier for children, older travelers and frequent fliers - populations that are unlikely to pose a security risk - so that it may devote its attention to other passengers. According to the new measures, travelers younger than 12 years old and older than 75 no longer have to take off their shoes to pass through airport security, and can go through metal detectors and body scanners several times rather than being patted down. As part of a new program called TSA PreCheck frequent fliers will also be allowed to keep their shoes on and their computers in their bags when they pass through security. David Castelveter, a T.S.A. spokesman, said that "these enhancements are part of our evolving risk-based security approach." The idea is, he said, "to move away from one-size-fits all model to providing the most effective security in the most efficient way."