Dr Selma Dritz tells the story of how the AIDS epidemic started in Los Angeles and San Francisco in the early 80's and how AIDS was connected to the gay liberation movement. She also talks about the government and community responses at that time.

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.