Background
On the morning of September 11, 2001, the terrorist group al-Qaeda carried out a series of attacks on U.S. soil. Four passenger planes were hijacked. Two crashed into the Twin Towers of the World Trade Center in New York, the third hit the Pentagon in Washington, and the fourth — Flight 93 — crashed in a field in Pennsylvania after passengers tried to regain control. These attacks were the largest terrorist actions on U.S. territory. Thousands died, symbols of American economy were destroyed, and a new era in global politics and security began.

Interesting facts
One of the most striking facts is the heroism of New York City firefighters who saved about 18000 people from the World Trade Center buildings. The event was broadcast live, and millions around the world witnessed the collapse of the towers. The term Ground Zero became the name for the site of the tragedy. It later became a symbol of remembrance and recovery. After the attack, a global campaign against terrorism began, known as the War on Terror.

Key figures
Total number of deaths — 2977 people, not including 19 terrorists.
More than 6000 people were injured.
Damage from destruction is estimated in tens of billions of dollars.
Clearing Ground Zero took about 12 months.
More than 10000 workers participated in building the new World Trade Center complex.

Related stories
After the attack, the U.S. Department of Homeland Security was created.
Aviation security rules changed worldwide: new screening procedures, liquid restrictions, biometric checks.
Many countries strengthened border control and began anti-terror cooperation.
The event also influenced culture: many films, books, and documentaries were created about September 11.

Tourist sites
Today, visiting September 11 memorials is an important part of educational tourism.
At the site of the Twin Towers in New York, the National September 11 Memorial was built. It includes two fountains located at the towers’ footprints and a museum with stories of victims, rescuers, and witnesses.
In Washington, the Pentagon Memorial features 184 benches — one for each victim.
In Pennsylvania, the Flight 93 Memorial includes a wall of remembrance and a hero’s alley.
These places have become symbols of memory, courage, and recovery. They attract millions of tourists each year and remind us of the importance of peace and security.

Conclusion
The September 11 terrorist attack was a tragedy that changed the world. But it also became a point of unity, remembrance, and reflection. Tourism connected to this event helps people understand its scale, honor the victims, and think about the future.