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September 11 attacks | History, Summary, Location, Timeline, Casualties, & Facts | Britannica
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Sept. 11, 2001: What happened at World Trade Center, Pentagon - The Washington Post
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 "9/11 Attacks: What Happened On September 11 At Twin Towers, World Trade Centre 18 Years Ago")
9/11 Attacks: What Happened On September 11 At Twin Towers, World Trade Centre 18 Years Ago
4 men convicted in 1993 WTC bombing have had sentences cut | AP News
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