After the IS group in Syria: Helping families trace loved ones who have disappeared

The fight against the Islamic State group in Syria may now be won, but for the families of an estimated 8,000 people who disappeared during IS group detention, not knowing what happened to their loved ones is a daily agony. We speak to Nadim Houry, Director of the Terrorism and Counterterrorism program at Human Rights Watch, about a new initiative to get international governments to support victims' families in their quest to uncover the truth.