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9/11: 15 Years Later, Looking Back on the Day the World Changed
Catch up with NBC News Clone on today's hot topic: Mmvo42789957989 - Breaking News | NBC News Clone. Our editorial team reformatted this story for clarity and speed.
It has been 15 years since the Twin Towers, the Pentagon, and the Pennsylvania countryside were struck by hijacked passenger planes. Lester Holt looks back at how the U.S. and the world have changed.
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