cox, whoase facebook's specializes in being empathetic to the user, who has guided facebook to be a littleore cautious about their product testing, to bring it to use earlier so people are not surprised by things and gradually introducing products. he had a way of approaching this that was a little bit easier for people -- or might be easier for people to understand. it's only rolled out in a few countries but soon will be rolling out around the world. david: introduce us to chris cox. his role is to be the standardbearer for more empathy and look at how innovations and changes might be greeted by people who use facebook. tell us about how he fits into the management hierarchy. sarah: as mark zuckerberg expands his range of things that he is dealing with they have a big portfolio of stuff. there is oculus, whatsapp, messenger, internet.org, the service that includes internet beaning drones to deliver coverage to people in other parts of the world. zuckerberg is talking to foreign leaders and barack obama. chris cox is the guy dealing with facebook on a day-to-day basis. he is basically run