Facebook said this week it’s taken down several networks of fake accounts to guard against meddling in the U.S. election, the latest crop tied to Russian intelligence services. The company says those accounts on Facebook and Instagram could have been used to leak hacked documents. It also removed several inauthentic Chinese accounts that in some cases shared material related to President Donald Trump and former Vice President Joe Biden. Amy Scott speaks with Sarah Frier, a reporter for Bloomberg, who’s been following developments.