Transportation Security

Joseph Leahy / St. Louis Public Radio

The Transportation Security Administration is clearing more than a quarter of the nation's commercial passengers for expedited screening as it expands its PreCheck program. Nationwide, the number of airports participating in the program has expanded from about 40 last year to more than 100 today.

During a press conference at Lambert Airport Tuesday, Federal Security Director William Switzer said travelers can now find separate screening lines at all concourses.