A mountain gorilla holds her infant son at the Kahuze Biega Nature Park near Bukavu, Democratic Republic of Congo. All species of gorillas are endangered, the mountain gorillas critically so. They number in the hundreds. The United States is a member of the Congo Basin Forest Partnership, working to conserve gorillas, chimpanzees and their habitat. The populations have been decimated by hunting and disease -- or simply are eliminated by local militia to clear forests for mining or charcoal production. (© AP Images)