The BBC's minute-by-minute coverage of the day America marked a decade on from the 9/11 attacks.
The US pauses to mark 10 years since the 9/11 attacks on New York, Washington and Pennsylvania which killed nearly 3,000.
Al-Qaeda is believed to be behind a 'credible' threat to New York and Washington ahead of the 9/11 anniversary, the US secretary of state says.
The story of the man who orchestrated the 9/11 attacks
Memories and sorrow as the city looks back
Satellite images show Pentagon before and after 9/11
Images of the flag tributes to those killed on 9/11
Is it time to stop using the term 'Ground Zero'?
73 minutes that changed my life
Thousands are suffering from illnesses linked to the attacks
Does one book perfectly capture the era of the attacks?
It suffered badly after the attack, but has proved resilient
Ten years of slowly evolving conspiracies