"C J Campbell" wrote in message
Thought that one was a little funny myself. We allow non-citizens to be
airline pilots. Why wouldn't we allow non-citizens to do this?

may be the same reasoning that requires (unarmed) security personel
at the airport -- the ones who pat you down and check the contents of
your carry on for nail clippers or knitting supplies -- to be citizen,
while the machine guns holding soldiers patrolling the same airport do
not have to be...

--Sylvain