The 1993 World Trade Center bombing was a terrorist attack, carried out on February 26, 1993, when a truck bomb detonated below the North Tower of the World Trade Center. The 1,336 pound urea nitrate-hydrogen gas enhanced device was intended to send the North Tower crashing into the South Tower and to kill tens of thousands of people.  It failed to do so but took the lives of six and injured over a thousand.   T.J. Russo Consultants was retained on behalf of the New York City Port Authority, to investigate the incident on their behalf and to conduct an analysis of the emergency back-up systems, smoke spread, life safety issues and more.