The New Killing Fields revisits Cambodia, Yugoslavia, Rwanda, and East Timor-sites of four of the worst instances of state-sponsored killing in the last half of the twentieth century-in order to reconsider the success and failure of U.S. and U.N. military and humanitarian intervention. Through original essays and reporting by, among others, David Rieff, Peter Maass, Philip Gourevitch, William Shawcross, George Packer, Bill Berkeley, and Samantha...