![Facebook CEO Mark Zuckerberg.](/web/20170106202021im_/http://www.smh.com.au/content/dam/images/g/s/t/d/o/v/image.related.wideLandscape.460x259.gtlnlx.png/1483492926103.jpg)
Zuckerberg reveals his 2017 personal challenge
Mark Zuckerberg has revealed his annual personal challenge: he wants to have visited and met people in every US state by the end of 2017, in an effort to better understand the "division" he feels is growing between people that use the social network he founded.