Beverly and Dereck Joubert are wildlife documentary producers. This husband and wife team lived in northern Botswana and captured on film the family relationships of the last free-roaming elephants left in Africa. Their 1994 film "Reflections on Elephants," contained ground-breaking footage of lions attacking an elephant calf. Previously, such attacks were thought to be only mythical. Their book "Hunting With the Moon: The Lions of Savuti" was published last year by Random House.