3. 1st World Trade Center Bombing (Dead: 6; Injured: 1,040)
While the 9/11 attack on the World Trade Center was devastating, it was not the first attempt to bring the two towers down.
On February 26, 1993, a yellow Ryder moving van was driven into the World Trade Center's public parking garage in the North Tower.
Several minutes later, 1500 pounds of nitrate-hydrogen gas exploded, punching a hole 98 feet wide through four levels of concrete.
The plan was carried out by a group that called itself The Liberation Army, 5th Battalion. This is believed to be a front, however, as this attack was financed by Khalid Sheikh Mohammed, who was the primary planner for the 9/11 attack.
The attackers hoped to collapse the North Tower and have it crash into the South Tower, causing thousands of deaths.
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