The 1993 World Trade Center bombing was a terrorist attack on the World Trade Center in New York City, carried out on February 26, 1993, when a truck bomb detonated below the North Tower of the complex. The 1,336 lb (606 kg) urea nitrate–hydrogen gas enhanced device was intended to send the North Tower (Tower 1) crashing into the South Tower (Tower 2), bringing both towers down and killing tens of thousands of people. It failed to do so, but killed six people, including a pregnant woman, and injured over one thousand. 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 Salameh, Nidal A. Ayyad, Abdul Rahman Yasin, and Ahmed Ajaj. They received financing from Khalid Sheikh Mohammed, Yousef's uncle. 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 truck carrying the bomb.