Transcription: The scene was one of chaos and confusion. It's an ambulance! Give us an ambulance! A huge lunch hour explosion underneath the World Trade Center complex literally sent shockwaves through the two 110-story buildings. Well-placed U.S. counterterrorism sources tell CNN they suspect the explosion was caused by a car bomb in an underground parking lot. The motive is not known, but the terror that was caused on this day is now well known. Gary Tuchman, CNN, New York.
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