Just over a century ago, there were an estimated two million chimpanzees living in Africa. Today it's estimated those numbers have dwindled to 150,000, thanks in large part to poaching and the illegal international wildlife trade. News about threats to the continent's great wildlife is nothing new, but news about efforts that are making a difference isn't something we often hear. Ofir Drori is the founder of the organization, The Last Great Ape, and the co-author of The Last Great Ape: A Journey through Africa and a Fight for the Heart of a Continent.