[mulmen]

The FAA does not run airport security.

The FAA administers aviation, an actual necessary and valuable endeavor. The theatrical display you are subjected to in airports is overseen by DHS as justification for their continued existence as a jobs program. It has nothing to do with aviation.

But yes, the FBI would be happy to have fugitives be caught at an airport checkpoint, although I doubt they’d risk relying on DHS to do it.

[bredren]

At what point does a person’s purchase of an international flight ticket trigger an alert to LE?

Or does getting a notification like this require a warrant or similar court approval first?

[qingcharles]

I don't know that the system is all that great. I've known people with multiple warrants fly around and in/out of the country multiple times before finally getting stopped.