Originally Posted by
SEA737
Interesting. Yeah, not my experience. Hard to extrapolate though, but it doesn't look like the vast majority are getting that kind of questioning. Definitely not at the gate.
This usually happens at check in. Do you have TSA Precheck? If your KTN is on your reservation and the carrier participates, they will not ask you any additional questions on international flights bound for the US. If not, it depends.
On the other hand, the "SSSS" designator that brings extra bag checks is supposedly random.