It is a deep dive into the inner workings of Facebook.A Wall Street Journal investigation out this week alleges deceit and dangers at the social media giant.Among its conclusions? Facebook's platforms are -- quote -- "riddled with flaws that cause harm, often in ways only the company fully understands." John Yang has more.Judy, the series called "The Facebook Files" is based on The Journal's review of internal company documents.The stories highlight the ways in which Facebook handles or doesn't handle a range of issues across its vast digital empire, from the negative effects of Instagram on young people to misinformation and violent content.Jeff Horwitz is the lead reporter on the series and joins us now.Jeff, thanks for being with us. You have got four installments that have published so far. You have a fifth coming.Is there a common thread or a common takeaway to all these stories that you're finding?There are probably a couple.One is that Facebook has, in the last few years, come to understand, through significant research, what its effects are on society.And they turn out to be pretty grave in some instances. And it is not all good news they're finding. In fact, a lot of it is very bad.And I think how the company has done that work and responded, or more often than not, not responded to it, is, I think, a very important thing.
