April 12, 2010 A columnist for The New York Times since 2001, Kristof and his wife, Sheryl WuDunn, won a Pulitzer Prize for their coverage of China's Tiananmen Square democracy movement. He won a second Pulitzer in 2006 for his columns on Darfur. Kristof is co-author, with WuDunn, of the recent bestseller "Half the Sky: Turning Oppression into Opportunity for Women Worldwide." Listen to his lecture at the Columbia University Graduate School of Journalism here. Less