A man accused of killing 10 people in Buffalo, New York was allegedly motivated by a racist doctrine known as 'replacement theory.' It's just a new name for an old set of racial hatreds, Kathleen Belew told NPR. Belew is an assistant professor of history at the University of Chicago and the author of Bring The War Home: The White Power Movement And Paramilitary America.NPR's Quil Lawrence reports from Buffalo on the aftermath of the shooting, and NPR's Adrian Florido takes a closer look at the supermarket where it took place. In participating regions, you'll also hear a local news segment to help you make sense of what's going on in your community.Email us at considerthis@npr.org.