Members of Clerkenwell Fire Station's Green Watch observe a minutes silence for their fellow fire-fighters who lost their lives in the 9/11 terrorist attacks in New York, September 11, 2011 in London, England. Ceremonies held around the world have joined Washington and New York as they commemorate the tenth anniversary of the 9/11 terrorist attacks where nearly 3000 people died when four hijacked airliners were used in coordinated attacks against the United States. (Photo by Peter Macdiarmid/Getty Images)
International 9/11 Memorials
People around the world honor the victims of the September 11 attacks.