Two days, three hearings and six things we still don’t know about Russia’s election meddling on social media

After three congressional hearings in two days, there seems to be no doubt in the minds of U.S. lawmakers that Russia weaponized Facebook, Google and Twitter to spread disinformation and sow social unrest around the 2016 presidential election.

That doesn’t mean, however, that their investigation is finished.

In reality, lawmakers are really just getting started. Concerns remain about the full scope of the Kremlin’s activities, beyond the new revelations that trolls reached more than 140 million Americans on Facebook around Election Day. And lawmakers still aren’t convinced the tech industry has a full grasp on the problem.