[The Conversation Africa] Armed men have killed at least six rangers and wounded several others in an ambush in eastern Democratic Republic of Congo's (DRC) Virunga national park. This park is a sanctuary for endangered mountain gorillas. Staff working in the park have often come under attack. Judith Verweijen and Esther Marijnen - experts on armed mobilisation and conservation in the DRC - explain why this happens and what must be done to protect them better.
