FILE - Travelers walk through a TSA security checkpoint at Reagan National Airport in Washington, March 24, 2026.

FILE - Travelers walk through a TSA security checkpoint at Reagan National Airport in Washington,  March 24, 2026.

The move is a start toward reviving a tradition that largely disappeared after the Sept. 11, 2001, attacks 25 years ago this week.

(Image credit: Mark Schiefelbein)