Johannesburg, South Africa (CNN) – When he lost his second parent to HIV/AIDS seven years ago, Ayanda Buthelezi's future seemed bleak. "I thought maybe God hated us," said Buthelezi, now 22. "We were very scared. … But I had to be strong for my brother because he was still young." As orphans in Johannesburg, the … Continue reading CNN Heroes: South African teens get virtual mentoring from all over the world