1993 WTC Bomb: A Warning Shot

Police officers assist a survivor of the 1993 World Trade Center bombing in New York on Feb. 26, 1993. In an eerie foreshadowing of Sept. 11, 2001 attack, a truck bomb went off in the building's basement parking garage, causing an explosion that killed six people and injured more than 1,000.

Victims from an explosion caused by a terrorist bomb at New York's World Trade Center are aided by rescue personnel. The 1993 bombing was traced to a rented van loaded with 1,500 pounds of explosives that was detonated in a basement parking garage.

Three men use oxygen masks to aid in breathing after escaping the World Trade Center's noontime explosion, caused by a truck bomb on Friday, Feb. 26, 1993. More than 50,000 were evacuated into the cold and snowy streets.

People run from the underground PATH rail station after an explosion at the World Trade Center in New York Feb. 26, 1993. Thousands walked blindly down staircases filled with choking black smoke, emerging to a wintry city landscape. Changes made in fire stairwells after this bombing were credited with saving lives in the 2001 attack.

Victims from an explosion caused by a terrorist bomb at New York's World Trade Center are aided by rescue personal on Feb. 26, 1993. Helicopters plucked some survivors from the rooftops and firefighters escorted others down stairs. Electricity was lost and dense smoke filled the buildings.

Fire, police and other emergency vehicles block the street near the twin towers of New York's World Trade Center hours after an explosion cleared the buildings Feb. 26, 1993.

Workers clear debris in an underground corridor at the World Trade Center in New York, in this March 1, 1993 photo, taken three days after an explosion rocked the building. The truck bomb left a 150-foot-wide crater in underground parking lot.

The seven-foot deep crater in an underground parking garage at the World Trade Center is shown in this Feb. 27, 1993, photo. The blast caused by a Ryder truck loaded with explosives caused nearly $300 million in property damage.

Clues in the rented truck used in the 1993 bombing led authorities to a Jersey City neighborhood and the Masjid Al-Salam mosque, above, in Jersey City, N.J. This mosque is where Omar Abdel-Rahman, the blind sheik convicted of plotting the bombing of the World Trade Center and of other New York City landmarks, preached.

Sheik Omar Abdel-Rahman, shown in this April 6, 1993 photo, was convicted on Oct. 1, 1995, of directing militant Muslims to kill scores of Americans with bombs and frighten the U.S. into changing its Middle East policies with the 1993 New York bombing. He and nine others were charged with a conspiracy to bomb the U.N., FBI headquarters in Manhattan, two tunnels and a bridge on a single day in New York in 1993.

World Trade Center bombing suspects Eyad Ismoil, 26, left, and Ramzi Yousef, 29, foreground, watch the jury in this artist's rendering as the verdict is read Wednesday, Nov. 12, 1997, in New York. U.S. District Judge Kevin Duffy looks on in background. The defendants were found guilty on all counts.

Ann DiGiovanni blows a kiss in memory of her son, John, at the World Trade Center in New York on Monday Feb. 26, 1996, at an outdoor memorial dedicated to the victims of the 1993 bombing, including DiGiovanni's son. That memorial was destroyed in the Sept. 11, 2001, attack that eclipsed the earlier bombing.