Lars Olof Kallings talks about the global AIDS situation and what the international community can do. He reflects on the role of men, women and young people in the fight against AIDS, and stresses the importance of activists and voluntary organizations.

Helene Gayle is an AIDS expert who has been working in many different initiatives in the US, among them the Centers for Disease Control (CDC). She also works in President Obama's advisory group on HIV/AIDS. Here she talks about understanding and changing behaviors.