US President Barack Obama speaks at a "Concert for Hope" in Washington, rhythm and blues star Patti LaBelle performs.
The September 11 Memorial opens in New York.
Beams of light illuminate the night sky where the World Trade Center towers once stood.
Obama delivers a blessing before crowds assembled at Ground Zero in New York as ceremonies marking the 10th anniversary of the attacks of September 11, 2001 begin.
With tears and emotion, Americans gather at Ground Zero in New York to mark the 10th anniversary of the attacks of September 11.
France honours 9/11 victims with a replica of the twin towers as Europe, Asia and the Middle East mark the 10th anniversary.
The names of passengers and crew aboard United Flight 93 are read out loud in a ceremony on the 10-year anniversary of the September 11 attacks. Katharine Jackson reports.
Former President George W. Bush laid a wreath at the Pentagon as Americans gathered to honour victims of the September 11 attacks.
Some US airports further beef up security after intelligence about a plot linked to the 9/11 anniversary targeting Washington DC and New York City.
A comprehensive release of many of the recorded communications between military and civilian air traffic controllers of the hijackings on September 11, 2001 have been made public for the first time.
People on the streets of Wellington remember their experiences 10 years on from the the World Trade Center attacks of September 11, 2001.
Marcus Robinson captures the beauty of construction at Ground Zero and the spirit of the people who are shaping New York's skyline following 9/11 in "REBUILDING," a series of drawings, paintings and time-lapse film that depict different moments in the ever-changing construction landscape.
Ten years on, Muslim Americans reflect on the struggle their communities face in the US post 9/11.
A look back at some of the most powerful photographs of the September 11, 2001 attacks.
A retired rescue dog of 9/11 now enjoys the good life in Annapolis, Maryland.
Following criticism and an investigation that cited radio communications failures during the September 11 attacks, the Fire Department of New York upgrades its equipment and increases man power, to be better prepared in the event of a large-scale crisis.
The World Trade Centre site will not be completed by the 10th anniversary, but the memorial plaza will serve as hallowed ground for families to commemorate their loved ones.
Ten years after their husbands were killed in the World Trade Centre attacks, two widows reflect on their emotional journeys.
The 9/11 attacks shattered America's sense of security and opened the door to what some have called a dark chapter in the civil liberties of its citizens.