XIX International AIDS Conference in Washington D.C. The speakers are the HIV/AIDS activists Phil Wilson and Cornelius Baker, Dr Sheldon Fields and Gregorio Millet from CDC who is also the Senior Advisor in the US Office of National AIDS Policy.

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.