The letter and number codes on a boarding pass tell a lot about you, including whether you've been chosen for extra screening ...

The letter and number codes on a boarding pass tell a lot about you, including whether you've been chosen for extra screening. Here's what they mean.

The TSA agent who scanned our boarding passes asked us to step aside while he radioed his supervisor. “We got a quad,” he said. That’s TSA shorthand for SSSS.

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