FILE - In this October 16, 1973 file photo, US Secretary of State Henry Kissinger, left, is congratulated by President Richard Nixon in the Oval office of the White House, following the announcement that Kissinger was a joint winner of the 1973 Nobel Peace Prize. Kissinger and North Vietnamese diplomat Lo Duc Tho won the prize for their efforts in ending the Vietnam war, one of the most controversial decisions made in the history of the Nobel Peace Prize. Le Duc Tho declined the award. (AP Photo, File)