A wedding was the scene of political violence in Afghanistan on Sunday. ISIS targeted a minority group, the Hazara, who have been trying to get their voices heard in the ongoing talks to end the 18-year-old war. And, we begin a four-part series on the origins of African slavery in America. Historians say that Sunday marks the 400th anniversary of the arrival of the first enslaved Africans in what would become the US. Also, we hear a requiem for a glacier in Iceland.