There are few things more dreaded in US airports than a long, snaking security line. But, if you see the letter "SSSS" printed on the bottom of your boarding pass, expect to spend some extra time with the fine people at Transportation Security Administration (TSA).

That's because the passengers whose boarding passes bear these four letters have been pre-selected for additional security screening.

"SSSS stands for Secondary Security Screening Selection and it appears on a passenger’s...

Continue Reading If you see this mysterious code on your boarding pass, get ready to be searched