Dec 10

WASHINGTON — Under pressure from Congress to speed access to U.S. skies for commercial drones, the government granted four companies permission Wednesday to use drones for aerial surveillance, construction site monitoring and oil rig flare stack inspections.

The Federal Aviation Administration has unveiled a new air traffic control system, ADS-B, that incorporates the Global Positioning System to more accurately track airplanes in flight. Tom Bearden examines ADS-B, which the FAA has promised will make air travel safer…