"I left work and I felt so deflated," one doctor said about an effort to counter misinformation he saw on Facebook. "I let it get to me."

The meeting took place during Zuckerberg’s most recent visit to Washington, where he testified before Congress about Facebook’s new cryptocurrency Libra.

Towns from Washington state to Indiana have seen armed groups begin patrolling the streets after rumors spread on social media about an antifa invasion.

Steven Carrillo and his alleged accomplice "came to Oakland to kill cops," said John Bennett, special agent in charge of the San Francisco division of the FBI.

Researchers and experts say QAnon has emerged in recent months as a sort of centralized hub for conspiracy and alternative health communities.

A 64-page document that was later disseminated by close associates of President Donald Trump appears to be the work of a fake "intelligence firm."

Disinformation experts are anticipating that social media platforms will continue to be central to foreign and domestic efforts to mislead voters.

Facebook also removed hundreds of fake accounts linked to conservative media outlet The Epoch Times.