US President and Nobel Peace Prize laureate Barack Obama (2nd L) enters the Nobel Peace Prize ceremony with first lady Michelle Obama at City Hall in Oslo December 10, 2009. Obama received the gold Nobel Peace Prize medal and diploma in a lavish ceremony in the Norwegian capital on Thursday.[Agencies]

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Nobel Peace Prize laureate US President Barack Obama (centre L) and his wife Michelle arrive for the Nobel ceremony at the Oslo Hall December 10, 2009. Obama acknowledged criticism of his Nobel Peace Prize on Thursday but said he hoped it would subside if he succeeded in his goals, including cutting nuclear weapons and tackling climate change.[Agencies]