https://www.reuters.com/article/us-facebook-zuckerberg/zuckerberg-defends-facebooks-approach-to-free-speech-draws-line-on-china-idUSKBN1WW2LJ

Facebook Inc Chief Executive Mark Zuckerberg on Thursday defended the social media company's light regulation of speech and lack of fact checking on political advertising, while citing China's censorship as a roadblock to operating in the country.