What happens next in this paragraph?

How to get a known traveler number
Go for tsa precheck if you only travel within the united states.
If you're a lawful u.s. citizen or permanent resident and you just travel within the united states, this may be the program for you. Get your ktn through tsa precheck so that you don't have to bother with getting a passport.
Pre-enroll for tsa precheck online. In order to start the application process, visit.