In 2014, American journalist James Foley was executed by ISIS militants. Video of his murder was posted online, shocking the world. The moment changed his mother Diane Foley’s life forever. And years later, when offered the chance to meet one of her son’s killers, she decided to take the opportunity. She shares that story in the book American Mother, co-written with author Colum McCann. Piya Chattopadhyay speaks with them about the life and death of James Foley, and the importance of listening to people you hate, and who hate you.