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

On the morning of September 11, 2001, 19 terrorists, hijacked 4 commercial jetliners and turned them toward targets chosen for destruction. Two of the planes, loaded with fuel and passengers, were flown at full speed into the Twin Towers of the World Trade Center in the financial district of New York City. The buildings burst into flame and then collapsed, killing thousands. A third terrorist crew crashed their plane into the Pentagon, headquarters of the U.S. military in Arlington, Virginia.

The hijackers of the fourth airliner apparently intended to hit another target in the Washington, DC area, but passengers on the plane realized what was happening and fought back. This airplane crashed in a field in rural Pennsylvania.

The 19 men who carried out the hijackings came from Saudi Arabia, Egypt, and other Arab states. They were affiliated with the al-Qaeda network, a radical Islamic group led by Saudi exile Osama bin Laden and dedicated to waging a holy war against the United States. The targets they chose to destroy perfectly symbolized U.S. financial, political, and military power.

Years in the making, the attacks in New York and Washington constituted the first major foreign assault on the continental United States since 1814, when the British army invaded Washington, DC, and burned the White House. More people were killed on U.S. soil on September 11, 2001 than on any day since the American Civil War. The attack killed nearly 3,000 people, and unified the American public as never before. Nations all across the globe sent their sincere condolences and vowed to stop the flow of terrorism.
on September 11, 2001 a plane was hijacked by a enemies from anther country and crashed the plane full of innocent passengers into the twin towers. taking hundreds of life from people on the plane, in the buildings, and on the ground