Watch Mark Zuckerberg Call Astronauts in Space Today Via Facebook Live

The founder and CEO of the world's largest social network will call the space station at 12:55 p.m. EDT (1655 GMT) to speak with NASA astronauts Tim Kopra and Jeff Williams, and British astronaut Tim Peake of the European Space Agency. NASA will stream the cosmic conversation on its Facebook page here: https://www.facebook.com/nasa.