For all the commentary, the sorrow and rage, all the second-guessing about everything that followed, it’s still hard to fathom what happened on 9/11. Photographer James Nachtwey was in New York that day, and he took some of the iconic photos of the Twin Towers as they crumbled. "I’ve actually never gotten over it," he says. On the twentieth anniversary of 9/11, Nachtwey reflects on his life as a war photographer, and we consider the deep history of war itself. We also examine a very difficult question: Is war ever worth it? Original Air Date: September 11, 2021 Guests:  James Nachtwey — David Shields — Leymah Gbowee — Margaret MacMillan Interviews In This Hour:  Remembering 9/11 Through The Lens Of A Photojournalist — War is Beautiful? — Humans Have Gotten Nicer and Better at Making War — Is War Inevitable?