1969 - The children’s program Sesame Street debuts on the National Educational Television network (later the Public Broadcasting Service) and soon becomes an international hit. Since its debut, local co-productions of Sesame Street have been developed in nearly 30 countries and versions have aired in more than 120 nations. International co-productions engage child-development experts in each country to "translate the magic of Sesame Street in a way that captures the rich cultural flavors of each region." (© AP Images)