The destruction of the twin towers of the World Trade Center and the attack on the Pentagon - all within one hour on 11 September 2001 -demonstrate America's shocking vulnerability to terrorism. But the terrorists' war against America actually started eight years earlier, when the mysterious terrorist mastermind Ramzi Yousef bombed the World Trade Center in an attempt to fell the buildings. His attacks were viewed as the harbinger of a new terrorism, carried out by an elusive enemy driven by religious fanaticism to unprecedented hatred of the USA. But is that perception accurate?