i dont think its everythings solved and we all pack up and go homethe pressure is on however this past week after widespread criticism over the christchurch video facebook changed its policies to restrict the use of its live streaming service at a summit in paris with president emmanuel macron of france and prime minister jacinda ardern of new zealand on wednesday the company also signed a pledge to reexamine the tools it uses to identify violent contentmr schroepfer 44 is in a position he never wanted to be in for years his job was to help the social network build a topflight ai lab where the brightest minds could tackle technological challenges like using machines to pick out peoples faces in photos he and mr zuckerberg wanted an ai operation to rival googles which was widely seen as having the deepest stable of ai researchers he recruited phds from new york university the university of london and the pierre and marie curie university in parisbut along the way his role evolved into one of threat removal and toxic content eliminator now he and his recruits spend much of their time applying ai to spotting and deleting death threats videos of suicides misinformation and outright liesnone of us have ever seen anything like this said john lilly a former chief executive of mozilla and now a venture capitalist at greylock partners who studied computer science with mr schroepfer at stanford university in the mid1990s there is no one else to ask about how to solve these problemsfacebook allowed us to talk to mr schroepfer because it wanted to show how ai is catching troublesome content and presumably because it was interested in humanizing its executives the chief technology officer often shows his feelings according to many who know himi dont think im speaking out of turn to say that ive seen schrep cry at work said jocelyn goldfein a venture capitalist at zetta venture partners who worked with him at facebookimagecreditdavid paul morrisbloombergbut few could have predicted how mr schroepfer would react to our questions in two of the interviews he started with an optimistic message that ai could be the solution before becoming emotional at one point he said coming to work had sometimes become a struggle each time he choked up when discussing the scale of the issues that facebook was confronting and his responsibilities in changing themits never going to go to zero he said of the problematic postswhat a burden what a responsibilityone sunday in december 2013 clment farabet walked into the penthouse suite at the harrahs hotel and casino in lake tahoe nev inside he was greeted by mr schroepfer and mr zuckerbergmr zuckerberg was shoeless over the next 30 minutes the ceo paced back and forth in his socks while keeping up a conversation with dr farabet an ai researcher at new york university mr zuckerberg described ai as the next big thing and the next step for facebook mr schroepfer seated on the