Well of course if you believe the official report on 9/11, (the catalyst for everything that's happening now) 3 commercial airliners full of people allowed a handful of terrorists armed with tiny knives to somehow fly said aircraft into the World Trade Centre and the Pentagon, completely destroying the WTC and killing around 3000 innocent people.
Since then, we've been involved in two of the longest running wars in history, hundreds of thousands of people have died, trillions of dollars have been spent on the war effort, and the west has more enemies now than ever before. The world is not a better place for "The war on terror".
I've often wondered, what if those passengers had been able to over power the terrorists and those planes safely landed, what the world would be like today? Cheers, Terry.