If the criteria they use become known, you're also creating a loophole for terrorists to target. I can't remember the name of it, but some years back there a w

If the criteria they use become known, you're also creating a loophole for terrorists to target. I can't remember the name of it, but some years back there a was a film (or possibly a TV drama) about a Chechen-American jihadi -- pale-skinned, blue-eyed and red-haired.