As of now, TSA PreCheck is available at more than 200 airports across the nation, with 85+ participating airlines. Eligible passengers can check to see which
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What Airport Does Not Use Tsa?
San Francisco International Airport is one of a handful of airports in the United States that does not use the Transportation Security Administration (TSA) for its security screening. Instead, the airport employs private contractors to provide this service.
There are a number of reasons why an airport might choose to do this, including the potential for increased efficiency and effectiveness.
The part in bold is my favorite.