I'm talking about the time period before security screening started at most airports... when hijackings were common. Look at the 50s-70s. An attack on an airp

I'm talking about the time period before security screening started at most airports... when hijackings were common. Look at the 50s-70s. An attack on an airplane is simply too challenging for the vast majority of people to execute. It is currently difficult to execute. It won't be if we had no security. Search for "Security screening" on this wiki article: http://en.wikipedia.org/wiki/Metal_detector http://en.wikipedia.org/wiki/Metal_detector You will notice that they were rolled out in the 70s as security screening started at airports. It was proven effective and unless you can make an argument why people wouldn't pose security threats now with no security checkpoints you won't convince any actual decision maker anywhere.