contamination. our top story this hour, we take our cell phones everywhere we go. now researchers say that your iphone is keeping track of everywhere that you've been. they say they've discovered a file hidden in the operating software of iphones and ipads that tracks your location history. joining to us talk about this is new york bureau chief for wired.com, john, thanks for joining us here. we are hearing so much about how our personal data is being misused and abused. should we be shocked, should we be shocked here that they are actually collecting our location and storing it now? on our iphones? >> yeah. shocked might be a little bit strong. it is a little disturbing. there's no real reason that we know of yet for them to be doing this. they didn't say that they were doing it. it came as a surprise to everyone. there might be a purpose that they're intending to put this to. it might have just been an accidental legacy part of development. right now it is disturbing but