It's been 20 years since 9/11. In many ways, it feels like a moment. In others, it's a lifetime removed. The weekend was filled with memories, both of that awful day and the days surrounding it. Life changed. We were all affected by the events of that day, and still are. Some of the ways are only now becoming apparent. Today, I welcome Katrina vanden Heuvel back to the show. It's been a while since we last spoke, so we have a lot of catching up to do.