In the wild heart of Africa there is a dwindling group of savannah elephants so traumatised by decades of war, poaching and conflict with humans, that when they see a helicopter, they don't run away, they charge. While the choppers are a means of providing vital conservation measures, such as collaring programmes to monitor under-threat animals for their own protection, these majestic animals have learned to defend themselves in an area so wracked with human conflict it’s been dubbed the "Triangle of Death". Combine the dangerous reality of several tons of angry pachyderm with the threat of armed militias, and almost impenetrable terrain, and you have potentially life-threatening conditions for man and mammal. Yet these are the conditions faced by a determined team, including a British vet, who have just successfully carried out the first ever collaring programme on the last population of a species in the Democratic Republic of Congo.