Marine Sgt. Ross Gundlach and a military service dog, a golden lab named Casey, faced more than 150 missions together in Afghanistan, sweeping roads for bombs in the south Helmand Province. Today on River To River, host Ben Kieffer talks with Sgt. Gundlach about his experience and reunification with Casey in Iowa earlier this month. Also, anthropologist Matt Hill of the University of Iowa, on what makes our relationship with dogs so unique.