The Daily Beast's Women in the World summit closed Sunday—an extraordinary three-day session in which some of the most powerful women on the planet met to discuss global challenges and propose solutions, in a stirring call to arms. From Queen Rania and Valerie Jarrett to Hillary Clinton, Nora Ephron and Katie Couric, the assembled blew the roof off with their ideas and their passion for change. Below, watch moments from the summit, including peace activist Leymah Gbowee urging Michelle Obama to meet with African first ladies, Meryl Streep speaking with real-life heroine, Irish civil rights activist Inez McCormack, and Diane Sawyer's emotional conversation with Marietou Diarra and Molly Melching.

 PhotoBuzz: MARCH 12: (L-R) Event co-host and designer Diane von Furstenberg, U.S. Secretary of State Hillary Rodham Clinton, event co-host and founder and editor-in-chief of The Daily Beast Tina Brown, Queen Rania of Jordan, and event co-host Alyse Nelson attend the 'Women In The World: Stories and Solutions' global summit at Hudson Theatre on March 12, 2010 in New York City. (Photo by Michael Loccisano/Getty Images)

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