As the railroads tried and failed to control flooding in the Salton Sink, state and federal leaders realized America needed a bigger solution. With the Great Depression in full swing, workers from across the country traveled to Vegas in hopes of working on the Hoover Dam. In the second part of this week's two-part episode, Ben, Noel and Max explore the construction of this modern marvel -- and bust some of the most popular Hoover myths along the way.