Christmas

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Protesters throw Molotov cocktails in Athens on Wednesday, Dec. 15, 2010, as hundreds of demonstrators clashed with riot police across the center city, smashing cars and sending Christmas shoppers fleeing during a massive labor protest against the crisis-hit government's austerity measures. (AP Photo/Alkis Konstantinidis)

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President Barack Obama with his family, from left, Sasha Obama, first lady Michelle Obama, obscured and Malia Obama, greet performers and Andrea Bocelli, right, during the Annual Christmas in Washington presentation at the National Building Museum in Washington, Sunday, Dec. 12, 2010. (AP Photo/Manuel Balce Ceneta)

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The first family, from left, Sasha Obama, first lady Michelle Obama, President Barack Obama, and Malia Obama, applaud during the Annual Christmas in Washington presentation, at the National Building Museum in Washington, Sunday, Dec. 12, 2010. (AP Photo/Manuel Balce Ceneta)

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Annie Lennox performs Dec. 12 during the Annual Christmas in Washington presentation at the National Building Museum in Washington. (Associated Press)

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The first family, from third from left, President Barack Obama, Malia Obama, Sasha Obama, first lady Michelle Obama, the first lady's mother, Marian Robinson watch the Annual Christmas in Washington presentation at the National Building Museum in Washington, Sunday, Dec. 12, 2010. (AP Photo/Manuel Balce Ceneta)

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President Barack Obama, front left, assists children dressed like elves he and his family, from back left, Malia Obama, Sasha Obama, obscured, first lady Michelle Obama, and the first lady's mother Marian Robinson, attend the taping of the Annual 2010 Christmas in Washington at the National Building Museum in Washington Sunday, Dec. 12, 2010. (AP Photo/Manuel Balce Ceneta)

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President Barack Obama, with his family first lady Michelle Obama, left, and their children Sasha Obama, obscured, and Malia Obama, third from left, are joined by from third right, Matthew Morrison, Mariah Carey, and host Ellen DeGeneres, during the Annual Christmas in Washington presentation, at the National Building Museum in Washington, Sunday, Dec. 12, 2010. (AP Photo/Manuel Balce Ceneta)

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Paper decorations hang from the vandalized Glastonbury Holy Thorn Tree which has been hacked down and reduced to just a stump in Glastonbury western England Friday Dec. 10, 2010. The tree, a major Christian landmark in England, was vandalized just weeks before Christmas Day. The tree is said to be linked to the arrival of Saint Joseph of Arimathea in England after the crucifixion of Jesus. It draws hundreds of visitors each year.

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Pope Benedict XVI is framed through Christmas decorations as he delivers his blessing during the Angelus noon prayer from the window of his studio overlooking St. Peter's Square, at the Vatican, on the occasion of the Immaculate Conception of Mary, Wednesday, Dec. 8, 2010. (AP Photo/Andrew Medichini)

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A couple with a dog walking towards an illuminated Christmas tree in front of a manor house in Gelsenkirchen, western Germany, Wednesday, Dec. 1, 2010. Germany faces ice cold temperatures and snow. (AP Photo/Martin Meisner)

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A Christmas tree with synthetic snow is displaying on La Promenade des Anglais, in Nice southern France, Thursday, Dec. 2, 2010. (AP Photo/Lionel Cironneau)

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The Rockefeller Christmas tree, a 12-ton, 74-foot Norway spruce covered with 30,000 energy-efficient lights , is lit in Rockefeller Center in New York, Tuesday, Nov. 30, 2010. (AP Photo/Henny Ray Abrams)

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The Rockefeller Center Christmas tree stands lit during the 78th annual lighting ceremony Tuesday, Nov. 30 , 2010 in New York. (AP Photo/Stephen Chernin)

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The Cross Hall, looking towards the East Room is seen as the State Floor of the White House is decorated for Christmas, Wednesday, Dec. 1, 2010, in Washington. The theme for the White House Christmas 2010 is "Simple Gifts". (AP Photo/Charles Dharapak)