How to add tsa precheck to american airlines?

American Airlines allows passengers to add TSA PreCheck to flight bookings for expedited airport screening. By including your Known Traveler Number when booking or accessing your reservation later, you can register for PreCheck privileges. American Airlines add TSA PreCheck is a simple and convenient way to expedite your security screening process on most international travels. If any passengers have questions about American Airlines adding TSA PreCheck, they can read a blog on the airline's pet policy.