US government claimed to be tracking millions of smartphone users’ location data

The Department of Homeland Security (DHS) used huge volumes of people’s cell phone location information quietly extracted from smartphone apps to track their movements on a scale not previously known, the American Civil Liberties Union (Aclu) claimed on Monday.
The Aclu published thousands of pages of previously unreleased records about how Customs and Border Protection, Immigration and Customs Enforcement, and other parts of the Department of Homeland Security are “sidestepping our Fourth Amendment right against unreasonable government searches and seizures”.
The records, which the Aclu obtained over the course of the last year through a Freedom of Information Act (FOIA) lawsuit, shed new light on the government’s ability to obtain the most private information by simply opening the federal wallet.