Seymour Hersh broke the My Lai massacre story during the Vietnam War and he was among the first to document the extent of the abuses and the cover-up at the Abu Ghraib prison in Iraq. Hersh tells Steve Paulson how he got those stories and how he functions as an investigative reporter and outsider. Hersh is the author of “Chain of Command: The Road from 9/11 to Abu Ghraib.”