Tech companies have long argued that users should be able to judge content for themselves - but critics say social media giants such as Facebook and Twitter have a responsibility to make sure their platforms are not being used to incite violence or spread misinformation. Facebook says it has a plan to take aggressive measures if that happens during this year's U.S. presidential election. - Subscribe to our channel: aje.io/AJSubscribe - Follow us on Twitter: twitter.com/AJEnglish - Find us on Facebook: www.facebook.com/aljazeera - Check our website: www.aljazeera.com/ #AlJazeeraEnglish #US #USElection #US2020 #Facebook #InsideStory