epa04049356 A photograph made available on 31 January 2014 shows the Robert C. Byrd Green Bank Telescope, the largest steerable radio telescope in the world, at dusk in Green Bank, West Virginia, USA, 30 January 2014. To protect the observatory from radio interference, the Federal Communications Commission designated 13,000 miles (20,921 km) surrounding the facility as a National Radio Quiet Zone, where wireless communications such as radio, cell phone, and wi-fi are severely restricted. EPA/JIM LO SCALZO
