Transportation Security Administration (TSA) officer Stephen Candia (L) explains new rules to Evelyn Schulze, 76, at a security check at Portland International Airport (PDX) March 19 in Portland, Ore. The TSA has modified screening procedures for passengers 75 and older, allowing them to keep their shoes on during screening. The change has been implemented at four airports nationwide as a part of a pilot program. Natalie Behring/Getty Images