In our series, CTM in Focus, we expose new information on issues that impact us all. In this installment, we take an inside look at how advertisers track our location through our phones and how criminals could exploit that information. More than 1,000 apps reportedly collect location data, fueling an estimated $21 billion market. But lawmakers and some tech leaders argue it must be regulated. Tony Dokoupil obtained some of the sensitive data, thanks to a whistleblower.
