Ambassador Wendy Sherman shares lessons from high-stakes negotiations Iran reportedly is still allowing inspections and complying with the nuclear agreement it signed in 2015, even after President Trump withdrew the U.S. from the deal. Ambassador Wendy Sherman spent four years negotiating with Iran and world leaders on the nuclear accord. Sherman joins "CBS This Morning" to discuss her new book, "Not for the Faint of Heart: Lessons in Courage, Power, and Persistence." She also discusses her experience negotiating with North Koreans.