same sentence, the same access would be very quick to cut down on that but because it's viral screen emco face but we think anyone was using it nicely, that doesn't happen. so your view on the impacts on children with a face because a look at that and whether we should be doing this with regards facebook being a product rather than a platform. >> was i find it telling people in silicon valley and look at the most elite private schools, they often of zero social media policies that they try to establish cultures were like you don't use phones and you don't connect with each other on social media. the fact that that is a trend in the elite high schools in silicon valley should be a warning to us all. it is super scary to me we're not taking like the safety first perspective with regard to children. like safety by design is so essential tickets because the burden that we have set up until now this idea that the public house to prove -- prove that facebook is did you come facebook is never have to prove that the product is safe for children. we need to flip that script. with pharmaceuticals a