SpaceX CEO Elon Musk introduces the first private tourist to travel to the moon. Twitter will give users the option of seeing tweets in reverse chronological order, as it did in its original timeline. Julie Chen is leaving CBS's 'The Talk,' but will remain on 'Big Brother.' Kanye West will be the musical guest on the season premiere of 'SNL,' and is expected to drop a new album, 'Yandhi,' the same day.