Americans have commemorated the 13th anniversary of the 9/11 terror attacks with ceremonies in New York and Washington.
The ceremonies included a reading out of the names of those who died in the attacks.
In New York, the ceremony was held at the new National September 11 Museum.
In Washington, President Barack Obama led mourners in a commemoration held on the White House lawn.
Ceremonies also took place at the Pentagon and in Pennsylvania where one of the hijacked planes crashed.
The anniversary comes just hours after Mr Obama laid out his strategy to counter Islamic State militants in Iraq and Syria.
“Our objective is clear: We will degrade and ultimately destroy [IS] through a comprehensive and sustained counterterrorism strategy,” he said in his address to the nation on Wednesday night.
Ceremonies began with a moment of silence at 08:46 am (12:46 GMT), the time when the first hijacked plane hit the World Trade Center.
