It's easy to edit video of public figures to make them appear asleep, confused, drunk or cognitively impaired when they are not. The technique is being used to undermine Joe Biden's campaign.

Banning the Chinese-owned social media platforms raises free speech concerns and could worsen the US-China trade war.

Many people who participate in disinformation campaigns are unwitting accomplices and much of the information they spread is accurate, which makes it all the harder to identify the campaigns.

A social media researcher explains how bots and sock puppet accounts manipulate and polarize public debate.