Chris Johns, Editor-in-Chief of National Geographic magazine, brings you face to face with a family of cheetahs. The story begins in Okavango Delta in Botswana-as the cheetah mother hunts her prey and the photographer tracks the elusive cat. After watching the family for four months, he is rewarded when a cheetah cub comes up and actually licks his hand-one of the most profound moments of his life. But the encounter brings a responsibility: to help...