Greed for horns endangers white rhinos

White Rhinos await buyers in pens at the annual auction in the Hluhluwe-Imfolozi national park, Sept 18, 2010. South Africa has suffered a huge increase in poaching of the endangered animals whose horns are prized as aphrodisiacs in Asia and elsewhere. [Photo/Agencies]

White Rhinos await buyers in pens at the annual auction in the Hluhluwe-Imfolozi national park, Sept 18, 2010.  [Photo/Agencies]