The WTC became a symbol of American capitalism and economic dominance, and therefore a vulnerable target for [[Islamic terrorism|Islamic terrorists]]. In 1993, Islamic terrorists detonated a massive truck bomb in an underground parking lot with the goal of knocking the towers over and killing its capacity of 25,000 workers. This attempt failed, killing only a few, but caused smoke and evacuation of the building. | The WTC became a symbol of American capitalism and economic dominance, and therefore a vulnerable target for [[Islamic terrorism|Islamic terrorists]]. In 1993, Islamic terrorists detonated a massive truck bomb in an underground parking lot with the goal of knocking the towers over and killing its capacity of 25,000 workers. This attempt failed, killing only a few, but caused smoke and evacuation of the building. |