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Australia - From Australia to Spain, formal ceremonies paid tribute to the nearly 3,000 people from more than 90 countries who died in the Sept. 11, 2001, terror attacks. Take a look at how people all over the world observed the anniversary. U.S. military flag bearer and band leave a national commemoration ceremony to mark the anniversary of the September 11 attacks at Commonwealth Place in Canberra, Australia. (Photo: Stefan Postles/Getty Images)

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Afghanistan - American soldiers at at Bagram Air Field, Afghanistan, stand at attention during an anniversary ceremony of the terrorist attacks.(Photo: John Moore/Getty Images)

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Afghanistan - An American soldier holds his head during prayers on September 11, 2011, at Bagram Air Field. (Photo:  John Moore/Getty Images)

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Afghanistan - A U.S. Army honor guard from the 1st Cavalry Division arrives at Bagram Air Field, Afghanistan, for an anniversary ceremony.(Photo: John Moore/Getty Images)

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England - Members of Clerkenwell Fire Station's Green Watch observe a moment of silence for their fellow firefighters who lost their lives in the 9/11 terrorist attacks in New York.(Photo: Peter Macdiarmid/Getty Images)

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England - People look at wreaths laid in memory of firefighters during a combined service of remembrance near London's St. Paul's Cathedral in memory of firefighters who have lost their lives in the United Kingdom and the 9/11 terrorist attacks.(Photo: Peter Macdiarmid/Getty Images)

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England - Not all observances were in support of the U.S. in London. Members of Muslims against Crusades gather at an anti-U.S. rally, held close to the memorial ceremony to mark the 10th anniversary of the September 11 attacks in central London.(Photo: AP Photo/Lefteris Pitarakis)

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Russia - The U.S. Ambassador to Russia John Beyrle, center, at the Church of St. Catherine in Moscow in remembrance of the Sept. 11, 2001 victims.(Photo: AP Photo/Sergei Grits)

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Russia - A girl attends an Orthodox service at Moscow's Church of St. Catherine in remembrance of the victims. (Photo: AP Photo/Sergei Grits)

Photo By Photo: AP Photo/Sergei Grits

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New Zealand - A member of the U.S. Marines carries their national flag past a man wearing a stars and stripes shirt during a special service to commemorate the 10th anniversary of the Sept. 11 terrorist attacks, at a church in New Plymouth, New Zealand.(Photo: AP Photo/Dita Alangkara)

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France - Model twin towers representing the towers of the World Trade Center are seen on stage during a commemoration to mark the 10th anniversary of the Sept. 11 attacks on the United States, at the Trocadero plaza near the Eiffel tower in Paris.(Photo: AP Photo/Thibault Camus )

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Germany - A moment of silence during a memorial service at the American Church in Berlin.(Photo: AP Photo/Markus Schreiber)

Photo By Photo: AP Photo/Markus Schreiber

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Germany - Religious leaders attend a ceremony to commemorate the 10th anniversary of the 9/11 terror attacks in Munich. (Photo: AP Photo/Matthias Schrader)

Photo By Photo: AP Photo/Matthias Schrader

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Indonesia - Indonesian activists carry a huge Indonesian flag during a rally to mark the 10th anniversary of 9/11.  (Photo: AP Photo/Achmad Ibrahim)

Photo By Photo: AP Photo/Achmad Ibrahim

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Israel - Israeli firefighters and U.S. naval officers hold wreaths, as they prepare to lay them during a ceremony marking the 10th anniversary of the terror attack, at a memorial site for the victims just outside Jerusalem, Israel.(Photo: AP Photo/Tara Todras-Whitehill)

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Japan - A damaged replica of the Statue of Liberty is lit during an event paying tribute to victims of both the Sept. 11 terrorist attacks and the March 11 earthquake in Ishinomaki, northeastern Japan.(Photo: AP Photo/Hiro Komae)

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Macedonia - The U.S. Embassy community in Macedonia's capital city of Skopje organized a Memorial Walk Sunday to honor the 9/11 victims, survivors and their families.  (Photo: AP Photo/Boris Grdanoski)

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Spain - Spain's Crown Prince Felipe (foreground, ctr l) Princess Letizia (foreground, 2nd l) shovel earth with the Ambassador to Spain, Alan Solomont (r) and his wife (2nd r) to plant a tree during a commemorative ceremony in Madrid. (Photo: AP Photo/Paul White)

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Philippines - Roman Catholic priest Fr. William Arana talks to resident-beneficiaries of a low-cost housing community in Manila, Philippines prior to a prayer ceremony Saturday to commemorate the 10th anniversary of the death of Mary Rose Abad.Abad's legacy lives on halfway around the world, in a once-notorious Manila slum, now turned into an orderly village that carries her name. Her Philippine-born American husband had a community of 48 one-story houses built in her memory. (Photo: AP Photo/Bullit Marquez)