Overview: In the third in a four part series that highlights the Lone Star State from high above and down below, we fly over our cities and industrial centers, hearing from some of Texas' greatest thinkers about striking a crucial balance about the stewardship between our states' economy and our natural resources. Check out a bottomland hardwood swamp at Gus Engeling Wildlife Management Area and the wood ducks that call it home. Visit the Aransas National Wildlife Refuge and see lots and lots of wildlife, including whooping cranes.