Gorillas Revisited with Sir David Attenborough: David Attenborough recounts his very personal experiences with the mountain gorillas of Rwanda. Ever since they were discovered over a century ago, these remarkable creatures have been threatened by loss of habitat, poaching, disease and political instability. But despite all odds their numbers have increased. David tells the extraordinary tale of how conservationists like Dian Fossey have battled to save the mountain gorilla from the brink of extinction.