Over the last year I have dead headed on several European carriers and noticed the cockpit door left open on many of them for the entire flight. The most recent was on Iberia Seville-Madrid-Rome and the cockpit doors were open for the entire flight. When I asked one of the crewmembers about their doors being open I got the impression they view cockpit incursions as an American problem. It's one thing to say you don't want armed marshals but quite another to leave the door open for the bad guys. Sometimes lessons have to be learned the hard way. This crew was lucky.