25th Anniversary of the Discovery of HIV/AIDS [audio 28min]

On the eve of the 25th anniversary of the discovery of the HIV/AIDS virus, Dr. Anthony Fauci, the U.S. government's top infectious disease researcher, talks with host Carol Castiel and VOA senior science correspondent David McAlary about progress made and challenges ahead in curbing the HIV/AIDS pandemic and how to confront the global threat of Avian Flu.