Steve Coll is the author of the Pulitzer Prize-winning Ghost Wars and the dean of the Graduate School of Journalism at Columbia University, and from 2007 to 2013 was president of the New America Foundation, a public policy institute in Washington, D.C. He is a staff writer for The New Yorker, and previously worked for twenty years at The Washington Post, where he received a Pulitzer Prize for explanatory journalism in 1990. He is the author of seven books, including On the Grand Trunk Road, The Bin Ladens, Private Empire, and Directorate S.