he also hosts a podcast called crazy genius. mark zuckerberg and the company itself has been mired in a variety of controversies in the last few months. how much about that? how much this is about the facebook model itself perhaps running its course? >> that's the perfect question. before i get to it, i think it's worth spending a bit of time savoring that statistic. this was the largest drop in value for any company in the history of the country. >> that's staggering. >> first, it tells us that facebook was incredibly valuable to begin with. number two, it shows that facebook crude screwed up. there is a money problem and a trust problem. the money problem is sort of interesting. it's the way that facebook makes money is that it sells ads in the middle of the news feed. we know what the news feed is. it's what we see when we enter