Iraqi Prime Minister Haider al-Abadi has officially declared Mosul retaken after the Islamic State group captured the city three years ago. The battle to liberate the country's second-largest city was one of the bloodiest in recent years. It killed thousands, left large areas in ruins and displaced more than 900,000 civilians. Major challenges now lie ahead for the Sunnis and Shiites of the region. Also, we see how the French government is helping a Syrian astrophysicist to build a new life in Paris.

And we meet Palestine's first and most famous DJ. Sama Abdulhadi makes techno music with a message based on her life experiences.