40 years later: Hersh on My Lai [audio 13min]

On March 16, 1968, U.S. soldiers entered the South Vietnamese village of My Lai and killed hundreds of unarmed civilians in what became the most notorious atrocity of the war. Forty years later, New Yorker correspondent Seymour Hersh walks us through the on-the-ground reporting behind his Pulitzer Prize winning scoop.