Have you hiked Mount Lafayette in N.H.'s Franconia Notch? We talk with N.H. author Ty Gagne, about his new book “The Last Traverse: Tragedy and Resilience in the Winter Whites." It’s the true story of two friends on a winter hike that goes awry, and the search-and-rescue efforts that keep it from becoming a bigger tragedy. What makes it especially relevant for this moment is the insight into how we make high-stakes decisions and manage risk in uncertain situations.