Reform Party presidential candidate Pat Buchanan, flanked by his wife Shelly, gives the thumbs-up to supporters after his speech at the Reform Party National Convention in Long Beach, Calif. in August 2000.
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Duncan Green, author of "How Change Happens." He says of activism: "There has to be a little part of you that acknowledges doubt, ambiguity and uncertainty. You have to have room to change direction."
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The nonviolent actions of Dr. King inspired young Kennedy Odede. In this March 21, 1965 file photo, King leads a civil rights march across the Edmund Pettus Bridge in Selma, Ala., to protest voting laws.
The Rev. Martin Luther King Jr. addresses a crowd in Birmingham, Ala., in 1966. President Obama has designated an historic civil rights district in Birmingham as a national monument.
Marie-Antoine Carême began his hardscrabble life in Paris during the French Revolution, but eventually his penchant for design and his baking talent brought him fame and fortune.
Veteran British war correspondent Clare Hollingworth, who broke the story that the World War II had begun, celebrates her 100 birthday during a party at the Foreign Correspondents' Club in Hong Kong in 2011. She celebrated her 105th birthday there this past October.
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