Armed Flight Deck
WW1 ,if the suicide hijacker knows there is a gun on the flight deck it does not solve a problem - it gives him a problem.
In the current security situation control of the aircraft is the target & is what has to be protected.
The safe use of a revolver is not rocket science - and recurrent training is only necessary for Special Forces/ Law Enforcement
professionals who need to be highly proficient at all ranges & under all sorts of conditions.
Flash2001, interesting post, there's nothing new under the sun
it seems.