'Yes or no?' U.S. lawmakers fume over Big Tech's answers on misinformation

FILE PHOTO: Facebook CEO Mark Zuckerberg testifies remotely via videoconference in this screengrab made from video during a Senate Judiciary Committee hearing titled, "Breaking the News: Censorship, Suppression, and the 2020 Election,? on Facebook and Twitter's content moderation practices, on Capitol Hill in Washington, U.S., November 17, 2020. U.S. Senate Judiciary Committee via REUTERS/File Photo

WASHINGTON (Reuters) -In their first appearance before Congress since Trump supporters stormed the U.S. Capitol, the chief executives of Facebook, Google and Twitter were asked by U.S. lawmakers whether their platforms bore some responsibility for the riot: "yes or no?"

Social media has been widely blamed for amplifying calls to violence and spreading misinformation that contributed to the Jan. 6 attempt to violently overturn the election results.