one of the top schools in the kingdom, was surprisingly progressive. the boys had a western uniform. they had trousers, shirts, jackets and shoes. reporter: faifel shaler had taught a number of bin laden s brothers. osama s family was well-known in saudi arabia. his father s career was the stuff of legend. the bin ladens were almost a storybook success. reporter: in saudi arabia, the bin laden name is everywhere. it s a vast empire with humble beginnings. the family patriarch, mohammed, seen here in rare photographs, rose from a menial laborer to head one of the largest and most successful construction companies in the middle east. he built the airport. he built virtually everything that was standing more than two meters high had been built by bin laden.