9/11 anniversary in pictures

The Tribute in Lights is tested from a rooftop near Ground Zero Photograph: Jin Lee/AP

Patty Sumner holds up a picture of her brother, Lt. Joseph G. Leavey, next to Ground Zero Photograph: Spencer Platt/Getty Images

A firefighter in an honour guard stands next to the reflecting pool at Ground Zero in memory of victims of 9/11 Photograph: Chris Hondros/Getty

Joe Biden consoles a 9/11 family member beside the reflecting pool at Ground Zero Photograph: Getty

A woman weeps during ceremonies marking the ninth anniversary of the 9/11 attacks, in New York Photograph: Pool

A photo of a victim is left by the reflecting pool during the ceremony for the ninth anniversary of the 9/11 attacks, at the site of Ground Zero Photograph: Reuters

A Muslim man prays with others at the reflecting pool at Ground Zero Photograph: Pool

A Port Authority police officer plays Taps on September 11, 2010, at the end of the ceremony at Ground Zero Photograph: Andrew Mills/AFP

Dignitaries including New Jersey governor Chris Christie, Jill Biden, Joe Biden, Michael Bloomberg and New York governor David Paterson join other mourners to drop flowers into the reflecting pool at Ground Zero Photograph: John Angelillo/EPA

Mourners holding pictures of pf family memebers gather around a reflecting pool in memory of victims of the 9/11 terrorist attacks Photograph: Pool

Luke Pavlenishzili, 2, reaches over with a rose to firefighter Joe Huber (R) while on the shoulders of his father George Pavlenishzili on the edge of a reflecting pool in memory of victims of the 9/11 terrorist attacks on Ground Zero Photograph: Chris Hondros/Getty Images

Anna Sereno, of the Brooklyn borough of New York, holds a photo of her son Arturo Angelo Sereno, who was 29, as friends and relatives of the victims of the Sept. 11, 2001 attacks gather for a commemoration ceremony at Zuccotti Park, adjacent to ground zero, Photograph: Jason DeCrow/AP

Family members gather around a reflecting pool in memory of victims of the 9/11 terrorist attacks September 11 Photograph: Pool

A mural commemorating the 9/11 attacks decorates the side of a building as a firefighter passes near Ground Zero Photograph: David Goldman/AP

Friends and family of 9/11 victims gather at Ground Zero Photograph: Chang W Lee/AFP

Alma Carrasco, left, of California, and her friend Cassandra Fradera, of New York, look at the World Trade Centre site on the ninth anniversary of the attacks Photograph: Stephen Chernin/AP

Victims' families walk toward New York's 9/11 commemoration site Photograph: Stephen Chernin/AP

People walk amongst flags erected by students and staff from Pepperdine University in Malibu, who placed nearly 3,000 flags in the ground to honour the victims Photograph: Mark Ralston/AFP

British Muslims burn the American flag outside the US embassy during a protest in London against the plan by pastor Terry Jones to burn the Qur'an Photograph: Andy Rain/EPA

A girl wears a button with the picture of Ruben Ornedo of Los Angeles, who was a passenger on American Airlines flight 77 which crashed into the Pentagon Photograph: Charles Dharapak/AP

US defense secretary Robert Gates and Michael Mullen from the US navy listen as President Obama delivers remarks during a ceremony marking the ninth anniversary of the 9/11 attacks, at the Pentagon Memorial in Arlington, Virginia Photograph: Jonathan Ernst/Reuters

A family listens to President Obama at a Pentagon memorial Photograph: Larry Downing/Reuters

Family members of 9/11 victims gather on the edge of the reflecting pool Photograph: Getty Images

President Obama lays a wreath at the Pentagon memorial Photograph: Charles Dharapak/AP

President Barack Obama hugs a member of the crowd following his speech Photograph: Charles Dharapak/AP

Visitors and victims' family members unfurl the Flight 93 flag at the temporary memorial in Shanksville, Pennsylvania Photograph: David Maxwell/EPA

Michelle Obama and former First Lady Laura Bush exchange words during a memorial service in Shanksville, Pennsylvania Photograph: David Maxwell/EPA

Pastor Terry Jones, who threatened to burn the Qur'an, is surrounded by reporters as he arrives at New York's LaGuardia airport Photograph: Mary Altaffer/AP

A woman argues against allowing a mosque near Ground Zero at a rally in lower Manhattan on September 11 Photograph: Spencer Platt/Getty Images

Supporters of the proposed Islamic centre and mosque to be built near Ground Zero demonstrate in New York, Saturday Photograph: David Goldman/AP

Girls hold signs outside the 9/11 Interfaith Peace Vigil at the Islamic Centre of Southern California Photograph: Robyn Beck/AFP/Getty Images

A group of Mennonites from Russell, Massachusetts sing hymns at Ground Zero Photograph: Spencer Platt/Getty Images

West Babylon firefighter Hassan Hamza bows his head after 9/11 commemorations Photograph: Mario Tama/Getty Images

A FDNY uniform is seen on display in St. Paul's Chapel during 9/11 commemorations Photograph: Mario Tama/Getty Images

New York City Honor Guard carry a flag found at Ground Zero during the attacks Photograph: Getty Images

John Blossom rests his head in his hand in quiet contemplation across from the site of the former twin towers Photograph: Gary Hershorn/Reuters

People walk past the famous cross discovered in the rubble of Ground Zero Photograph: Mario Tama/Getty Images

The 'Tribute in Lights' illuminates the sky over lower Manhattan and Jersey City as seen across the Hudson from Hoboken Photograph: Gary Hershorn/Reuters