At 12:48 30 March 2015, Mike Schumann wrote:

Since 9/11 the threat has changed. There hasn't been a successful
Hijackin=
g yet (except by pilots). Every attempt has been blocked by an immediate
r=
esponse by the crew and passengers to subdue to bad guy(s). The need for
s=
ecure cockpit doors has passed.

No it has not. Unauthorised access to the flight deck is still the greater
threat, still is potentially more harmful and more likely than any of the
other problems which occur in flight. The current incident is rare, very
rare as is a mechanical failure or mistake by the flight crew resulting in
a crash. The only reason there are fewer hi-jackings is that it has been
made too difficult.