Sort of right, Jo, but not quite. Our perception of security changed after 9/11. The facts of security were what they were already - the day before 9/11 the hijackers were getting ready but (some of) the world was blind to the possibilities of terrorism.

And since 9/11 security has escalated again and again. 9/11 is a landmark date for the awakening of the world, not for security getting worse.