Quick - who knows the US government's current national threat level? (It's been elevated or yellow for quite a while, with domestic and international flights being with high or orange).
Dan Piraro pointed out that Japan has a much more meaningful security advisory system, but apparently he forgot that we also have this: the Elmo Terror Alert Level
http://www.question911.com/
Check it out, if you dare.
When we get to 35 thousand feet, he usually does let go, so from there on out, all we have to worry about is Mothra, and, uh, we do have reports he's tied up
with Gamera and Rodan at the present time. Thank you very much."
-- Airplane announcement, "Thirty Minutes Over Tokyo," The Simpsons
http://www.snpp.com/episodes/AABF20
http://www.snpp.com/episodes/AABF20