The Justice Department has been collecting data from cell phone users on a mass scale for the past seven years by using electronic devices to mimic cellular towers, the Wall Street Journal reports.
The U.S. Marshals Service reportedly flew Cessna planes with technology capable of simulating cell phone towers.
The planes have flown out of at least five metropolitan airports but have a “flying range covering most of the U.S. population.”
By collecting data this way, the Justice Department doesn’t have to get records from cell phone companies.