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World remembers 9/11 attacks on 12th anniversary
Passerby watch as World Trade Centre turns into dust on September 11.
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World remembers 9/11 attacks on 12th anniversary
Survivor recounts horror as World Trade Centre falls.
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World remembers 9/11 attacks on 12th anniversary
From top to bottom, and left to right: The World Trade Center burning
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World remembers 9/11 attacks on 12th anniversary
At 9:02AM, air traffic controllers looked out of their window and witnessed a plane go into rapid descent and then hit the South Tower of the World Trade Center.
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World remembers 9/11 attacks on 12th anniversary
Another plane minutes before hitting second tower of World Trade Centre.
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World remembers 9/11 attacks on 12th anniversary
The second plane hits the South Tower of the World Trade Center.
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World remembers 9/11 attacks on 12th anniversary
Flight 11 crashes into North Tower of the World Trade Center, between floors 93 and 99.
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World remembers 9/11 attacks on 12th anniversary
The National September 11 Memorial & Museum is the principal memorial and museum commemorating the September 11 attacks of 2001.
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World remembers 9/11 attacks on 12th anniversary
Hundreds of still-mourning family and friends attended a somber ceremony on Wednesday to honour those who died.
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World remembers 9/11 attacks on 12th anniversary
12th anniversary of the September 11th attacks on the United States was observed with ceremonies around the US and elsewhere.
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World remembers 9/11 attacks on 12th anniversary
Almost three-thousand people died in the attacks on the World Trade Centre and the Pentagon, and in a plane crash in Virginia on September 11, 2001.
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World remembers 9/11 attacks on 12th anniversary
Wednesday marks the 12th anniversary of the horrific 9/11 attacks in the United States that killed around 3000 people.