9/11 anniversary

New York: Members of uniformed services surround a reflecting pool at the base of the World Trade Centre site Photograph: Mike Segar/AP

New York: A retired marine and his horse stand at attention Photograph: Timothy A Clary/AFP

New York: A crowd gathers near ground zero to commemorate the sixth anniversary of the attacks Photograph: Oded Balilty/AP

New York: The colour guard holds a flag during a commemoration ceremony at Zuccotti park Photograph: Frank Franklin II/AP

New York: A man looks at the ground zero site Photograph: Oded Balilty/AP

New York: A flag printed with the names of victims flies at the 9/11 memorial field Photograph: Mary Altaffer/AP

New York: An honour guard of New York city police department, New York city fire department and New York/New Jersey port authority police officers during a ceremony Photograph: Stan Honda/EPA

Washington: President Bush, first lady Laura Bush, vice-president Dick Cheney and his wife Lynne Cheney participate in a ceremony to honour the victims of the 9/11 terror attacks Photograph: Mark Wilson/Getty

Washington, US: President George Bush and Laura Bush bow their heads during a moment of silence on the south lawn of the White House Photograph: Mark Wilson/Getty

Shanksville, Pennsylvania: Visitors participate in a sunset remembrance yesterday at the United Airlines flight 93 crash site and memorial Photograph: Gene J Puskar/AP

Amritsar, India: Children and teachers light candles as they pay tribute to the victims of 9/11 Photograph: Raminder Pal Singh/EPA

New York: A photograph hangs on a fence in front of ground zero as a bell is rung to signify the first plane striking the north tower Photograph: Timothy A Clary/AFP