First World Trade Center bombing remembered

New Yorkers observed a moment of silence Tuesday to remember the first bombing of the World Trade Center 20 years ago, in what turned out to be a precursor to far deadlier attacks on September 11, 2001.

The silent moment was held at 12:18 pm, the time when the 1993 bomb exploded in a parking garage underneath the Twin Towers, killing six people and injuring more than 1,000.

Eight years later airliners hijacked by anti-American Islamist militants slammed into the towers, causing their collapse and killing nearly 3,000 people.