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Sept. 11, 2001
In the history of American television, has there ever been a more horrific moment than the 9/11 attacks? They took place before our eyes, and networks replayed the hellish spectacle, again and again. "The worst moment was watching the horror of the planes hitting the WTC and the ensuing destruction and chaos that followed that day," writes Phonegirl. "Those images will be forever engraved in my head."