Pulitzer Prizes are the preeminent mark of achievement in American journalism. As the prizes for reporting on Vietnam in defiance of official wishes show, they also point to the press's view of its role in society. That view has changed substantially over the more than eighty years of the Pulitzer Prizes' existence. Exposing official corruption on a local level had always been part of what journalists see as their function. But today, more than ever before, they are ready to write critically about the policies of the federal government, even in the once sacrosanct areas of foreign and national security affairs.