The debate over controlling access to the Internet took center stage in the U.S. Senate this week during a hearing that focused on "network neutrality" and possible new legislation that advocates say would protect the Internet from being fractured by special interests. The crux of the issue is a growing interest among telecom and cable companies, including AT&T and Comcast, which are the primary broadband service providers in the U.S., to charge content and service providers, such as Google, Yahoo, and Vonage, for use of those high-speed networks. At a hearing held Tuesday by the Senate Committee on Commerce, Science,...