Nobel Peace Prize laureate U.S. President Barack Obama signs the Nobel Peace Prize guest book as his wife Michelle (back 2nd L) and Norwegian Nobel Committee Chairman Thorbjoern Jagland (back L) look on at the Nobel Institute in Oslo December 10, 2009. Obama arrived in the Norwegian capital on Thursday to accept his Nobel Peace Prize amid criticism he does not deserve the accolade because of his Afghan war build-up and few foreign policy successes. REUTERS/Terje Bendiksby/Scanpix Norway