I think this is mentioned in a Q post?

Feb 26, 1993 - A bomb built by Islamic extremest exploded at the World Trade Center.

On February 26, 1993, at about 17 minutes past noon, a thunderous explosion rocked lower Manhattan. …

https://www.fbi.gov/history/famous-cases/world-trade-center-bombing-1993

On February 26, 1993, a bomb exploded in a parking garage of the World Trade Center (WTC) in New York City. This event was the first indication for the Diplomatic Security Service (DSS) that terrorism was evolving from a regional phenomenon outside of the United States to a transnational phenomenon. …

https://www.state.gov/1993-world-trade-center-bombing/

moar (interactive site)

https://timeline.911memorial.org/#Timeline/4