Cesarean sections to deliver babies are among the most common surgical procedures in U.S. hospitals. A new study from the National Bureau of Economic Research found that Black women are almost 25 percent more likely than white women to have unnecessary C-sections, putting them at risk of surgical complications. John Yang speaks with New York Times investigative reporter Sarah Kliff to learn more. PBS News is supported by - https://www.pbs.org/newshour/about/funders