we speak exclusively to the person heading up this issue, facebook vice president monika bickert. our top story, stocks slumped globally thursday as the world's two largest economies hardened their trade war stances, with chip stocks hit the hardest. we are joined by sarah mcgregor in washington, sarah ponczek in new york. i have the world indices up on bloomberg. all of them in the red. tell us where the most damage was. sarah p.: where we continue -- sarah m.: we continue to see a large selloff in energy stocks. we saw oil being killed today, down about 5%, taking energy stocks with it. within the tech space, we continue to see the damaged focused on hardware and semiconductor stocks. technically, a bright spot has been software stocks interestingly enough. because if you backtrack and look how stocks have performed since the weekend president trump put out the initial tweets about higher tariffs, tech is the worst performing sector, down 7%. but look at semiconductors down closer to 15%, and tech hardware down close to 11%, and software stocks are only down 2%. it all boils dow

emily: joining us to discuss facebook is the vice president of global policy management, monika bickertirst of all, what is driving this steep increase in fake accounts? where are they coming from? monika: emily, some of it is coming from new tools that people are using to try to create large amounts of fake accounts in an automated way. and understanding that, our engineers have really invested in building systems that can catch it. we have gotten better, and over the last quarter we have seen those efforts pay off. emily: are they from any particular country or any particular groups? monika: i don't have any other information to share on that. i would just say that we see fake accounts created all over the world. when we build our systems, we are focused on tackling that at a global level. emily: we just heard what zuckerberg had to say about encryption on a call. will this shift toward encryption, towards privacy, will that erased some of the progress you are making? monika: mark pointed to some of the challenges we will see, and i spent my career before i came to facebook -- for ove

criticism from media watchers, but on friday, the company's head of global policy management, monika bickertfended the company's decision. >> we think it's important for people to make their own informed choice about what to believe. our job is to make sure that we are getting them accurate rminion. and that's why we work with more than 50 fact-checking organizations around the world. >> nawaz: as of late today, the altered video remains available on facebook. so, what should viewers expect from facebook and other social media sites, when it comes to authenticating material on their platforms?po and is iible to screen all content from more than two iobiactive facebook users? for one perspective, i'm joined by franklin foer. he is a writer for "the atlantic," and author of "world without mind: the existential threat of big tech." welcome back to the "newshour". >> thank you. >> nawaz: facebook defended its decision to leave the video up. should they have removed it, in your view? >> this cut to the very core problem facebook faces, which is its ined tremendous reach and tremendous power over