"Donal" wrote
Nope! If the person has proper identification and credentials, and is
dressed in a business suit, it should be sufficient.

That is absolute rubbish!!! The 9/11 hijackers could easily have
satisfied
your criteria.

The 9/11 hijackers had US DoD ID badges and courier cards? I don't think so.
But, in any event, airport security didn't stop them then nor would it stop
them now. The problem was in the air. A hijacking had always meant a
little time spent in Cuba or other unintended destination but loss of life
had been very seldom. Hence air crews were trained to accomodate hjackers
willingly. And that's what happened in all but the last plane. That policy
has changed. I doubt 5 (?) hijackers could seize control of a plane
carrying 100+ people with box cutters today.