$ 0 0 Britain's Prince William and Catherine, the Duchess of Cambridge, leave a Christmas Day morning service at the church on the Sandringham Estate in Norfolk, eastern England.A protester holds a picture of journalist Tetyana Chornovil, who was beaten and left in a ditch just hours after publishing an article on the assets of top government officials, during a protest rally in front of the Ukrainian Ministry of Internal Affairs in Kiev.A man sleeps on the stairs of Grand Central Station as commuters pass by on Christmas Eve in New York.An ice encrusted tree glistens in the setting sun in Earl Bales Park following an ice storm in Toronto.A Free Syrian Army fighter holds his weapon inside a damaged building on the frontline of Old Aleppo.Han Zhong (R), a re-enactment actor playing the part of late Chinese Chairman Mao Zedong, has make-up applied before performing in a play entitled "Mao Zedong and His Eldest Son", staged to commemorate Mao's 120th birth anniversary, in Beijing.A South Sudanese girl living in the North reacts during Christmas day celebrations at a Catholic church in the Umbada locality of Omdurman.Turkey's Prime Minister Tayyip Erdogan greets members of his ruling AK Party (AKP) as he attends a meeting at party headquarters in Ankara.Ballerinas from the New York City Ballet's production of "The Nutcracker" pose for photos on the floor of the New York Stock Exchange on Christmas Eve in New York.Anti-government protesters clash with riot police at the gate of the gymnasium where candidates are due to register for the upcoming elections during a rally at the Thai-Japan youth stadium in Bangkok.