Two of the airplanes were crashed into the World Trade Center in New York City. The third plane was crashed on the Pentagon in Washington, D.C. The last plane was going to crash into another building but the passengers stopped the hijackers , and the plane crashed on a field.

On that day nearly 3.000 people died. The victims of the attacks were from more than 90 countries.

The men that arranged this terrible attack want Americans to feel afraid and disorganized. They want to make people who live in this country do what they say by threatening them.

At the site in New York where the twin towers once stood ,

called Ground Zero , thousands of people including U.S. President Barack

Obama attended remembrance services. Bells rang and there were moments

of silence.

In Canada , hundreds of people gathered at a hockey arena in Gander , N.L

British Prime Minister David Cameron and the relatives of 67 British people who died in the 9/11 attacks,

attended a ceremony in London.

Mourners in Tokyo , Japan , gathered in front of a glass case containing steel retrieved from Ground Zero .

They honoured 23 Fuji Bank employees who died in the WTC.

There was a ceremony in Australia. The country's prime minister said , "on this day, on behalf of millions of Australians, I say this : We do not forget , We never forget."