<a href="https://en.wikipedia.org/wiki/Transportation_Security_Administration" class="extiw" title="en:Transportation Security Administration">Transportation Security Administration</a>. Source converted by <a href="//commons.wikimedia.org/wiki/User:Imalipusram" title="User:Imalipusram">Imalipusram</a>
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vector data: Checkpoint Design Guide (PDF)