Raoul du Toit tracks rhinos and relocates them to safety. He won this year’s prestigious Goldman Environmental Prize for his work. Also in this episode, Kathy Vitzthum graduated magna cum laude from Iowa State University this month with a degree in accounting. It took her 19 years, one class at a time. Kris Mathur found gold, and his family’s Latvian roots, when he traveled abroad to the family’s ancestral home and unearthed buried treasure.