Deadly Iran Protests and U.S. Response | Dr. Emanuel on Longevity | ‘Sinner’ Cast on Globe Win

Amid the mass protests in Iran, two sources have told CBS News at least 12,000 people have been killed in the regime's crackdown. President Trump spoke about how the U.S. plans to respond, telling "CBS Evening News" anchor Tony Dokoupil, "we will take very strong action" if Iran hangs protesters. CBS News contributor Joe Zacks, a former deputy assistant director of the CIA, breaks down what to know. A trial is underway in northern Virginia for a man accused of plotting his wife's murder with help from his affair partner - the family's au pair. The former au pair was the first witness called to testify against Brendan Banfield. Jericka Duncan reports on the case. Claudette Colvin was just 15 when she was arrested in 1955 for refusing to give up her seat on a segregated bus in Montgomery, Alabama. The Civil Rights icon and pioneer died Tuesday at the age of 86. "CBS Mornings" co-host Gayle King has more on her legacy. Dr. Ezekiel Emanuel is an oncologist, professor and helped to write the Affordable Care Act. He speaks to "CBS Mornings" about confusion over changes to public health guidelines, living a fulfilling life and his new book, "Eat Your Ice Cream: Six Simple Rules for a Long and Healthy Life. Actor Ali Larter plays Angela Harris, the ex-wife of an oilman played by Billy Bob Thornton in the Paramount+ series "Landman." She talks to "CBS Mornings" about the series, working with Thornton and how she landed her role.