President Obama is the 2009 winner of the Nobel Peace Prize for "extraordinary efforts to strengthen international diplomacy and cooperation between peoples." The decision appeared to catch observers by surprise.
Leaders react to news
World leaders past and present react to word of President Obama's Nobel
How it's awarded
Norwegian lawmakers, aided by expert advisers, choose Nobel Peace Prize winners
Obama a unique winner
In winning the Nobel Peace Prize, Obama joins an elite group of U.S. presidents
44th President: Obama's First Year
Explore President Obama's priorities and track his agenda's progress
Timeline: Past laureates
Take a look back at some former recipients of the Nobel Peace Prize
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iReport.com: What's your reaction?
What do you think? Does Obama deserve the 2009 Nobel Peace Prize? Put your thoughts on video.
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