'National Geographic' photographer Joel Sartore is on a mission to capture every species in captivity. So far through his Photo Ark project, he has photographed nearly 18,000 of them. He joins the show to discuss the urgent effort to protect at-risk species. Later, Iowa State Ph.D. student Derrick Kapayou examines how the 2018 Des Moines flash floods reshaped East Des Moines communities and residents’ sense of stability.