When Asfaw Yemiru was 9 he lived alone on the streets in Ethiopia's capital city Addis Ababa. Now he will soon be 60 and has helped tens of thousands of poor children to go to school and achieve a better life. Asfaw is a very simple man. His only riches are all of his students, says Behailu Eshete who attended Asfaw's first class nearly 45 years ago.