"Zuckerberg told Rogan: "The background here is that the FBI came to us - some folks on our team - and was like 'hey, just so you know, you should be on high alert. We thought there was a lot of Russian propaganda in the 2016 election, we have it on notice that basically there's about to be some kind of dump that's similar to that'." He said the FBI did not warn Facebook about the Biden story in particular - only that Facebook thought it "fit that pattern".