The Democratic Republic of the Congo has a been a troubled nation for most of its modern history. Once a Belgian colony, the country’s now been at war with itself for two decades. But it’s not just the people of the region who’ve been caught in the crossfire. Congo’s Virunga National Park is one of the most biologically diverse places on Earth. It’s also home to many of the world’s last remaining mountain gorillas. In our weeklong series of interviews with the filmmakers behind this year’s Oscar-nominated documentaries, we hear from the writer-director of Virunga, a film following the people trying to protect the park and its gorillas from war, poachers, and oil companies.