Are You Optimistic?

CNN's John Sutter sat down with CNN iReporters to talk about his new book, "The Innovators" David McCulla: I think there is collective despair over the last 18, 19 months. But if you weren't optimistic, it would be hard to get through life," he says. The innovators are a group of young people who have changed our lives by discovering things that no one else had done before them.