Ira Flatow, host of NPR’s popular Science Friday, talks to O’Reilly’s E.A. (Emily) Vander Veer, author of “Facebook: The Missing Manual” about how to use Facebook and still keep control of your personal information. Science Friday broadcasts on Friday, March 21, 2 p.m. EDT. Emily’s discussion with Ira about Facebook starts in the second hour, about 3:15 p.m. EDT or so. We hope you tune in!