Who were the three African Americans that won noble prize?

There have been three African Americans who have won Nobel Prizes, not just in the past century, but in the history of the award:

* Ralph Bunche (1950) - Nobel Peace Prize for his work as mediator in the 1948 Arab-Israeli War.

* Toni Morrison (1993) - Nobel Prize in Literature for her novels that "characterize the essential aspects of American reality".

* Barack Obama (2009) - Nobel Peace Prize for his "extraordinary efforts to strengthen international diplomacy and cooperation between peoples".

It's important to note that while the Nobel Prizes have been awarded since 1901, the awarding of the Nobel Peace Prize has been the most frequent category with African American recipients.