In December 1992, he was contacted by Ramzi Ahmed Yousef, with whom he re-located to New York City on February 22, 1993 to begin preparing for the attack.

[1] On February 26, 1993, Ismoil, accompanied by Yousef, drove a van packed with explosives into the parking garage below the World Trade Center in Manhattan, New York.

The van exploded at 12:17 p.m., killing six people, causing numerous injuries, and inflicting an estimated five hundred million dollars' worth of damage to the WTC.

[7] In August 1995, Ismoil was captured by Jordanian authorities in Amman and extradited to the United States to stand trial in New York for his role in the bombing.

However, prosecutor David Kelly noted the fingerprints of both men which had been found in a Jersey City, New Jersey apartment where the bomb had been manufactured, telephone records, and automatic teller machine surveillance videos linking both Ismoil and Yousef to the purchase of chemicals used to create explosives.