Infection Rates Down & Optimism High Before AIDS Conference

Aired: 7/19/2012 | 0:06:28 | Clip
Some 25,000 scientists, political leaders, and advocates are expected to gather in Washington, D.C., next week for the world's largest AIDS meeting. Gwen Ifill talks with UNAIDS' Michel Sidibe about the successes and continuing challenges to treat and prevent HIV and AIDS.