Light pollution can come from TV and computer screens, other electronic displays and ambient sources such as streetlights, passing traffic and neighboring buildings, in addition to overhead lighting within the home.
The Electronic Communications Privacy Act (ECPA) strictly prohibits the interception of content and traffic data and limits access to stored communications (such as emails).
Such techniques have pushed the cost of carrying traffic on fiber down to about 1% of what it would cost on all-electronic equipment, and it will keep falling.
Make no mistake: What's in play is the emergence of a caste-based traffic system, one of robot-haves and have-nots, of steely-eyed electronic wheelmen vs.
Over the following nine minutes, air traffic controllers frantically tried to make contact with the cockpit, from which only heavy breathing and electronic noises could be heard before the microphone finally went dead.