In Philadelphia, protesters are taking to the streets over the killing of Walter Wallace Jr. It is part of a movement that has marked 2020 almost as much a the virus. But there’s something very different about this movement from similar ones in the past. Newshour: How this year’s antiracism protests differ from past social justice movements. “This is unprecedented. We have never seen this kind of white involvement in any social justice movement in American history, let alone racial justice. So, this is — we’re in a whole new ballpark.”