Speaker of the US House of representatives Nancy Pelosi (C) arrives at the ceremony for the Nobel Laureate and dissident Liu Xiaobo at the city hall in Oslo, on December 10, 2010. With the guest of honour stuck in a Chinese prison, this year's Nobel Peace Prize ceremony centred around an empty chair, as its celebration of dissident Liu Xiaobo continues to split the global community and infuriate Beijing. AFP PHOTO/ODD ANDERSEN