On a recent episode of “Talk To Al Jazeera,” the news agency’s Alan Fisher interviews Bill and Melinda Gates, co-chairs of the Bill & Melinda Gates Foundation, about their work. “The foundation concentrates its efforts in health, education and agriculture in both the developing and the developed world,” Al Jazeera writes, adding, “Inevitably it draws criticism because of what it does and how it does it — yet each year it spends billions of dollars trying to live up to its mission to help all people lead healthy and productive lives.” In the interview, the Gateses discuss their motivations for founding the organization, respond to criticism of their work, and talk about their visions and ambitions for the future (9/2).