What major event happened on September 11, 2001, in the United States?

September 11, 2001, also known as 9/11 was a tragic day in the United States. It was when an awful terrorist attack happened, led by the Islamic extremest group, Al Qaeda. The leader of them all was a man named Osama Bin Laden, who, after the attacks, hid until a group of US soldiers found and killed him. On 9/11, planes crashed into the two Twin Towers in New York, causing thousands of deaths. Another hijacked plane headed towards the Pentagon, crashing into the first floor and killing many including those inside the plane. One more plane crashed in field, its intentions still unknown as everyone inside died. All passengers on all three planes were terrorists on suicide missions. The motto of that day is "Never forget."

The Terrorist Group Al Qaeda targeted the World Trade Centers and took 2 massive air planes (with people on broad) and crashed them and finally bringing them down.