In this episode of Talk Nerdy, Cara is joined by Conor Knighton, CBS Sunday Morning correspondent and author of "Leave Only Footprints: My Acadia-to-Zion Journey Through Every National Park." They talk about the beauty, humanity, and hilarity of the most epic road trip across the US, from glaciers to the high desert, and most of the Hampton Inns between. Follow Conor: @ConorKnighton.
