Dr. Sanjay Gupta moderates a discussion about HIV/AIDS with former president Bill Clinton and AIDS experts and activists, including Partners in Health founding director Dr. Paul Farmer; Care USA president Helene D. Gayle; Richard Gere; Dr. Rowan Gillies, the international president of Doctors without Borders; Hank McKinnell Jr., the CEO of Pfizer Inc.; and MTV vice president Bill Roedy, who is leading MTV's efforts to promote HIV and AIDS education throughout the world.