terrorist attacks

There have been alot of terrorist attack in the USA, one of the biggest and most traumatic is the attack of 9/11. this were series of coordinated suicide attacks by al-Qaeda upon the United States on September 11, 2001. On that morening, 19 islamist terrorists afilliated with al-Qaeda hijacked 4 commercial passenger jer airliners. The hijackers intentionally crashed two of the airlines into the twin towers of the World trade Center in New York City, killing everybody on board and many others working in the building. Both buildings collapsed within two hours, destroying at least tow nearby buildings and damagin  others. The hijackers crashed a third airliner into the pentagon. The fourth plane crashed into a field in Pennsylavania, after some of its passengers and flight creww attempted to retake the control of the plane, which hijackers had redirected towards washington, they were not survivores from any of the fight.

After things like this the US is trying to prevent it putting more security in the airports like x rays and stuff like that.