… Barrack Obama, as of about half an hour ago.  The four U.S. Presidents to have received the Noble Peace Prize.

http://nobelprize.org/

http://www.cnn.com/2009/WORLD/europe/10/09/nobel.peace.prize/index.html

http://www.nytimes.com/2009/10/10/world/10nobel.html?_r=1&hp