Members of the audience look at slides projected on huge video screens during a speech given by Barton Haynes, director of the Duke Human Vaccine Institute and the Center for HIV/AIDS Vaccine Immunology (CHAVI), entitled "The Way Forward For Development of an HIV-1 Vaccine" during the XIX International AIDS Conference, Wednesday, July 25, 2012, in Washington. (AP Photo/Carolyn Kaster)

Associated Press
Members of the audience look at slides projected on huge video screens during a speech given by Barton Haynes, director of the Duke Human Vaccine Institute and the Center for HIV/AIDS Vaccine Immunology (CHAVI), entitled "The Way Forward For Development of an HIV-1 Vaccine" during the XIX International AIDS Conference, Wednesday, July 25, 2012, in Washington. (AP Photo/Carolyn Kaster)
Members of the audience look at slides projected on huge video screens during a speech given by Barton Haynes, director of the Duke Human Vaccine Institute and the Center for HIV/AIDS Vaccine Immunology (CHAVI), entitled "The Way Forward For Development of an HIV-1 Vaccine" during the XIX International AIDS Conference, Wednesday, July 25, 2012, in Washington. (AP Photo/Carolyn Kaster)
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