Tracking travelers through cell phone signals
Right now there are about 4,000 planes in the air. Two million people will fly on one today. That’s 735 million a year. With all those flights, come all those long lines at the airport.
Tracking travelers through cell phone signals
Right now there are about 4,000 planes in the air. Two million people will fly on one today. That’s 735 million a year. With all those flights, come all those long lines at the airport.