Seymour Hersh is an American investigative journalist and author, known for his groundbreaking work in uncovering government secrets and exposing corruption. He gained prominence in the late 1960s for his reporting on the My Lai Massacre during the Vietnam War, which revealed the U.S. military's involvement in the killing of hundreds of Vietnamese civilians. Throughout his career, Hersh has written for various publications, including The New Yorker and The New York Times. He has received numerous awards, including the Pulitzer Prize, for his investigative reporting, which often focuses on issues of national security and military misconduct.