US government agencies including ICE, FBI and Pentagon buy Americans' bulk cell phone location data from commercial brokers without warrants, exploiting Fourth Amendment loophole; Congress may close gap in April FISA 702 reauthorization as privacy groups warn of AI-powered mass surveillance risks.

Your data is everywhere. The government is buying it without a warrant

ICE is among the government agencies that buy commercial data about Americans in bulk. Mandel Ngan/AFP via Getty Images hide caption toggle caption Mandel Ngan/AFP via Getty Images A whole industry of data brokers buys up vast quantities of electronic information from cell phone apps and web browsers and sells it to advertisers who use that data to target ads. The same industry also sells that data, including bulk cell phone location data, to police departments and federal government agencies in...