(RNN) – Sunday marks the fifteenth anniversary of the worst terrorist attack in U.S. history, conceived by Osama bin Laden and executed by Al-Qaeda.
Killed that day were 2,996 people, including the 19 men who hijacked four jetliners and used them as bombs.
Of this number, 2,606 people were inside the World Trade Centers, 125 were at the Pentagon, and 246 were on the airliners.
President George W. Bush and former New York Mayor Rudy Giuliani managed to inspire the grieving people of New York and first responders unfurled a flag over the Pentagon.
Memorials were built at all three sites. In New York City, the memorial was built on the foundations of the two World Trade Centers; construction on the center was finished on Sep. 11, 2011.
Construction on the Pentagon Memorial was finished on Aug. 8, 2008.
The Flight 93 National Memorial honors the crew and passengers who fought the terrorists, crashing the plane in Shanksville, PA.
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