4) Bombing Of Wall Street
It is one of the oldest attacks in the history of United States. Thirty eight people lost their loves in the attack which took place in Wall Street of America. The nature of attack was reported to be one of the deadliest ones. The incident took place on 16th September 1920 at 12:00 noon. The financial district of the New York City was extremely disturbed and the terrorists behind this scene are yet to be traced.