A man is walking down the streets of Manhattan with his kid. All of a sudden they stop in front of a park, and the man comments to his son... "Just think, not too long ago the Twin Towers used to be here...". So the son asks him with an intrigued look in his face... "Dad, what were the Twin Towers?". "They were two very tall buildings with lots of offices, but 31 years ago a bunch of terrorists from the middle east crashed a plane into each one and they collapsed". "Dad, what was the middle east?"