Beverly and Dereck Joubert reflect on 40 years of African wildlife photography in new book

For more than 40 years, Beverly and Dereck Joubert have lived with, photographed and filmed African wildlife. Their images bear witness not just to the majesty of life on the continent, but also the host of threats that confront both the animals and the wilderness. John Yang speaks with the Jouberts about their new book, “Wild Eye: A Life in Photographs,” and their decades of work.