Nicholas Kristof, a columnist for The New York Times since November 2001, is a two-time Pulitzer Prize winner who writes op-ed columns that appear twice a week. In 1990, Kristof and his wife, Sheryl WuDunn, previously a Times journalist, won a Pulitzer Prize for their coverage of China’s Tiananmen Square movement. Kristof won a second Pulitzer in 2006 for what the judges called “his graphic, deeply reported columns that, at personal risk, focused attention on genocide in Darfur.” Kristof and WuDunn are authors of three best-selling books: China Wakes: The Struggle for the Soul of a Rising Power in 1994; Thunder from the East: Portrait of a Rising Asia in 2000; and Half the Sky: Turning Oppression Into Opportunity for Women Worldwide in 2009.