i'm daljit dhaliwal. for elephants, last year was one of the worst ever recorded. they're being slaughtered for their ivory at record rates, african elephants are increasingly the targets of global criminal trafficking networks. we travel to central africa to the frontline of the fight to save these creatures and meet one man who's dedicating his life to their protection. >> joseph: i've always been fascinated with the local wild animals but before i was powerless to protect them. >> daljit: but now dr joseph okouyi is anything but powerless. he is engaged in a dangerous struggle against a criminal network to protect these animals - his life-long passion. >> joseph: when i was young, i had a dog - i ate out of the same bowl as my dog. i don't think you could do this work without a passion for animals. >> daljit: this work is to be the chief warder leading teams of guards trying to save the lives of the animals in gabon's ivindo national park - 1200 square miles of almost- impenetrable virgin rainforest. and one of the animals joseph has dedicated his life to protec