On September 11, 2001, militants associated with 


extremist groups boarded four passenger airplanes. Soon 


after take-off they disabled the crews and took control of 


the aircraft with full loads of fuel and carried out the 


deadliest systematized suicide attacks on American soil.


 Two of the planes were deliberately flown into the twin 


towers of the World Trade Center in New York City, a


 third plane hit the Pentagon just outsideWashington, D.C.,


 and the fourth plane crashed in a field in Pennsylvania. 


Almost 3,000 people were killed during the 9/11 terrorist 


attacks. These attacks caused extensive death and 


destruction. More than 400 police and firefighters were 


killed after responding to the call, bravely rushing to the 


scene... and into the towers to save others that day. 

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