Guardians of the Wild: Operation Rhino
Across Africa, 97% of black rhinoceros have been killed for their horns. Due to poachers and the trade in rare animal parts, Zambia's wild black rhino population dropped from 12,000 to zero in just a few decades. Now, a small number of rhinos have been brought from South Africa to Zambia's North Luangwa National Park, where a team of dedicated caretakers will go to extraordinary lengths to keep them safe. It's one of the region's toughest conservation challenges yet.