# Flight 93
All time
Obama praises 9/11 unity on a low-key 11th anniversary
Relatives gathered as they do every year at the site of the World Trade Center attacks as the US president made a low-key appearance at the Pentagon which was also attacked.
In numbers: the September 11 terrorist attacks
2996 people died in the attacks on September 11, 2001. Here, in numbers, is the story of the actions that took place that day.
Watch: How 11 September 2001 unfolded
The key moments of one of the worst days in US history in words and video.
9/11 recordings: "Somebody's stabbed... I think we're getting hijacked"
Audio recordings made on the day of the 9/11 attacks document the reactions of flight crew, air traffic controllers and the US military as events unfolded.
