Once accepted, you'll receive a Known Traveler Number (KTN) that you can enter when booking flights. It costs about $78 for five years, but depending on which credit card you use, you may get TSA ...

In the post-9/11 era of air travel, the TSA implemented a policy in September 2006 that limited the amount of liquids, gels and aerosols to 3.4-ounce or smaller containers in passenger carry-on bags.

“All travelers — even those without TSA PreCheck — will soon be allowed to keep their shoes on during airport screening” under the TSA’s policy change, travel blog Gate Access reported ...

“In the old days, this wasn’t the case.” The new policy will likely be popular with air travelers, who previously needed TSA Pre-check to go through security without removing their shoes.

Travelers over age 75, children appearing to be younger than 13 years old and passengers enrolled in trusted traveler programs like TSA PreCheck and Clear were already allowed to keep their shoes on.