"We live by wild mercy," Terry Tempest Williams writes. In this hour, she takes us to some of her favorite national parks, from Big Bend to Arches. We also explore the desert wilderness of Utah's Escalante area, and hear about a father and daughter's remarkable adventure into the Arctic National Wildlife Refuge. Lauret Savoy says the American landscape also has a complicated history that can't be separated from the country's racism. And Robert Moor talks about the wisdom of trails. A Father and Daughter Venture Into the Alaskan Wild; Terry Tempest Williams on National Parks; Desert Mind; Land, Race, Memory; The Wisdom of Trails.