What's up with people and these retarded knee-jerk reactions ? And you got even modded insightful. This was obviously premeditated. You don't think the guy would be capable of doing the same thing if a clueless flight attendant was there while pilot is taking a leak ? A guy capable of killing himself and 150 other people like this is perfectly capable of knocking the flight attendants lights out before locking the door, and if he really intended to crash the plane... he would indeed punch her/him out first.
Second thing... there's what.. 100k flights per day for the last 10 years ? That's like 360000000 flights. For one freak occurrence you should not introduce new laws and regulations and shit. That's exactly what happened on 9/11
And finally, comment on your post title (This validates the US policy). -- The US has some of the stupidest policies ever. They are like everything else - fake.
On the surface (or on the paper) they look cool and effective, in real life they're just a shallow cover or a front for taking away your freedom and controlling your life.
I hope Europeans will actually think how they gonna deal with this instead of doing what Americans are doing. Perhaps incorporate emergency biometric scanner or something like that on the door that can override the "unlock" option ? There are dozens of better systems than