Precisely 47 years after the Vietnam War's My Lai massacre, the great Seymour Hersh, whose chilling dispatches stirred public outrage, has for the first time visited "the scene of the crime." Though well-schooled in the war's atrocities, he hears more stories "in bland appalling detail," grasps anew My Lai was "not an aberration," and affirms its still-crucial lesson: Duplicitous U.S. leaders colluded in an immoral war that ended, in part, when the press and the people spoke out against it.