For decades, Seymour Hersh has been an icon of muckraking, investigative reporting: his work exposed such atrocities as the massacre of Vietnamese civilians in My Lai and the torture of Iraqis in Abu Ghraib. He also documented the US's development of chemical weapons in the 60s, CIA domestic spying in the 70s, wrote a highly critical piece on the raid that killed Osama bin Laden in 2015 and did a whole lot more. Hersh speaks with Brooke about his latest book, Reporter: A Memoir, which chronicles his half century of reporting and the various obstacles he's encountered along the way. We spoke to Hersh in 2008 about his My Lai reporting. Listen here. We spoke to Hersh in 2015 about his bin Laden reporting. Listen here. This segment is from our June 8th, 2018 program, "Perps Walk."