GREETINGS FROM THE RADIO QUIET ZONE, where wi-fi is forbidden. “In 1958, the federal government created the National Radio Quiet Zone to shield the GBT and the nearby Sugar Grove listening post (now run by the National Security Agency) from electromagnetic interference. As a result, cellphone, television, and radio transmissions–all of which rely on electromagnetic waves–are heavily restricted within its 13,000-square-mile area and banned in a 10-mile radius around the GBT. Residents are not entirely cut off. They can access TV and Internet with cable.”