Bill Gates, co-chair, Bill & Melinda Gates Foundation
David Oshinsky, Pulitzer Prize-winning author of Polio: An American Story
The Bill and Melinda Gates foundation has released its annual letter, outlining goals for the coming year. What's on the list? Getting rid of polio, once and for all. Vaccines reduced the disease in the U.S. by 99 percent, but it still erupts in India, Pakistan, Afghanistan and Nigeria.