Major U.S. social media firms told a Senate panel Wednesday they are doing more to prevent or remove violent or extremist content from online platforms in the wake of several high-profile incidents, focusing on using more technological tools to act faster.
Critics say too many violent videos or posts that back extremist groups supporting terrorism are not immediately removed from social media websites.
Sen. Richard Blumenthal, a Democrat, said social media firms need to do more to prevent violent content.