March 16, 2014 Watch the full video at PBS NewsHour. "A conversation with Jonathan Mayer of Stanford on recent experiments studying metadata information that can be collected from cell phones. You might be surprised at how much it can reveal." Focus Area: Privacy Add new comment Your name Subject Comment * Once you hit Save, your comment will be held for moderation before being published. You will not see a confirmation message once you hit the Save button but please be assured your comment has been submitted and we will review it. What code is in the image? * Enter the characters shown in the image.