On Friday , February 26 , 1993 , the hotel was seriously damaged as a result of the World Trade Center bombing . Terrorists affiliated with al-Qaeda took a Ryder truck loaded with 1,500 pounds ( 682 kilograms ) of explosives and parked it in the North Tower parking garage below the hotel 's ballroom . At 12:18 PM ( EDT ) , the explosion destroyed or seriously damaged the lower and sub levels of the World Trade Center complex . After extensive repairs , the hotel reopened in November 1994
World Trade Center bombing
1993 World Trade Center bombing
Marriott World Trade Center