9/11 attacks in America completes 21 years, people pay tribute
On September 11, 2001, America was attacked by terrorists in the biggest attack.
Terrorists targeted the New York Game World Trade Center
Terrorists hijacked four commercial airplanes
The terrorists had targeted four different historical buildings with these four airplanes.
More than 3000 people were killed in America in this attack by terrorists.
The biggest reason for the death of people was the fire after the airplane collided.
Today, apart from America, people from all over the world are paying tribute to those killed in this attack.