Homeland Security For Dummies

We have a system in place where we can safely board a passenger airplane, safe from terrorists and hijackers, but not safe from the pilot and co-pilot.
If there had been one of those metal security cockpit doors on the plane, and it had been locked, how would the rest of the flight crew gotten inside to awake the pilot?

I propose a law that states either the pilot or co-pilot must be awake at any time.

(Was one of the Heene children aboard that plane ?!)