On Sunday, NewsHour Weekend reports from Africa, where an ongoing and ambitious two-year project is underway. The mission: to count all of the elephants on the continent of Africa. The $8-million initiative called the Great Elephant census, funded by an American philanthropist, aims to save elephants through conservation efforts. But as elephant numbers continue dwindle across Africa, due in large part to poaching, researchers -- already faced with a herculean task and countries resistant to join the census -- must first establish how many they are trying to save. NewsHour's Martin Seemungal reports.