Ira Glass, the host of This American Life, is headed to Seattle later this month to give a talk. We grabbed a few minutes with him to ask what it is that keeps him from sleeping. As a child, Ira Glass spent nights considering his own mortality. “I would just lie in bed, trying to get my mind around the idea that I would be dead and everything in the world would continue without me,” remembers Glass. After he witnessed an uncle ship out to Vietnam and saw coverage of life there as a soldier,