A father and his son are walking the Manhattan streets when the father stops at a vacant lot takes a deep breath and tells his son: "To think that at one time here on this very lot stood the Twin Towers." The son looks at his father and asked: "Dad, what are the Twin Towers?" Father says: "My dear son, the Twin Towers were two tremendously tall buildings with lots of offices that was the heart of the United States, but approximately 31 years ago, several Arabs destroyed the buildings."

The boy then thought for a minute and then asked his father: "Dad, what are Arabs?"