What Is 9 11 in American History?

The September 11, 2001, attacks, commonly referred to as 9/11 in American history, were a series of four coordinated terrorist attacks carried out by the Islamic extremist group al-Qaeda against the United States. The attacks had a significant impact on American history and changed the way Americans perceived national security.

The Attacks

On that fateful morning of September 11th, 19 hijackers affiliated with al-Qaeda boarded four commercial airplanes en route to California from Boston and Newark. Two of the planes were flown into the Twin Towers of the World Trade Center in New York City. Another plane crashed into the Pentagon in Arlington, Virginia, while the fourth plane crashed in a field near Shanksville, Pennsylvania.

The Aftermath

The aftermath of these attacks left over 3,000 people dead and thousands more injured. The destruction caused by these attacks was extensive and included significant damage to infrastructure and property. The World Trade Center buildings collapsed within hours of being struck by the planes, leading to massive loss of life and rendering much of Lower Manhattan uninhabitable for months afterward.

The Response

The US government responded to these terrorist attacks by launching a global war on terrorism that included military actions in Afghanistan and Iraq. The government also created new legislation such as the USA PATRIOT Act which expanded law enforcement agencies’ investigative powers to prevent future terrorist acts.

Impact on American History

The September 11th attacks had a profound impact on American history that is still felt today. It led to increased awareness about national security issues such as airport security measures and border control policies. It also spurred on changes in foreign policy such as increased military involvement in regions like Afghanistan and Iraq.

Furthermore, these terrorist attacks led to changes in American society’s perception of Muslims and Middle Easterners. Many Middle Easterners living in America faced increased discrimination and racial profiling as a result of the attacks.


The September 11th terrorist attacks were a significant turning point in American history. They changed the way Americans viewed national security, foreign policy, and the world at large. While the memory of that tragic day will never be forgotten, it is important to remember that unity and resilience are what helped America to bounce back from this tragedy.