When Neil Sheehan arrived in Vietnam as a young reporter in 1962, he had no idea that he was entering a conflict that would shape his entire career. As America's military involvement escalated, he found that the war he was observing firsthand no longer resembled the contest the U.S. government was trying to present to the American people. Sheehan's reporting brought him into intense conflict with the Pentagon and the State Department. As a New York Times correspondent, Sheehan acquired the Pentagon Papers, the Defense Department's classified history of the war, which revealed a...