World Trade Center Bombing, New York, N.Y., 1993

The 1993 World Trade Center bombing was a terrorist attack carried out by Ramzi Yousef and associates against the United States on February 26, 1993, when a van bomb detonated below the North Tower of the World Trade Center complex in Manhattan, New York City. The 1,336 lb (606 kg) urea nitrate–hydrogen gas enhanced device was intended to make the North Tower collapse onto the South Tower, taking down both skyscrapers and killing tens of thousands of people. While it failed to do so, it killed six people, including a pregnant woman, and caused over a thousand injuries. About 50,000 people were evacuated from the buildings that day. The attack was planned by a group of terrorists including Ramzi Yousef; Mahmud Abouhalima; Mohammad A. Salameh; Nidal Ayyad; Abdul Rahman Yasin; and Ahmed Ajaj. In March 1994, four men were convicted of carrying out the bombing: Abouhalima, Ajaj, Ayyad, and Salameh. The charges included conspiracy, explosive destruction of property, and interstate transportation of explosives. In November 1997, two more were convicted: Ramzi Yousef, the organizer behind the bombings, and Eyad Ismoil, who drove the van carrying the bomb. Emad Salem, an FBI informant and a key witness in the trial of Ramzi Yousef, Abdul Hakim Murad, and Wali Khan Amin Shah, stated that the bomb itself was built under supervision from the FBI. During his time as an FBI informant, Salem recorded hours of telephone conversations with his FBI handlers. In tapes made after the bombing, Salem alleged that an unnamed FBI supervisor declined to move forward on a plan that would have used a "phony powder" to fool the conspirators into believing that they were working with genuine explosives.