Zuckerberg defends Facebook's approach to free speech, draws line on China

WASHINGTON/SAN FRANCISCO (Reuters) - 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.Facebook has been under fire in recent years for its lax approach to fake news reports, state-backed disinformation campaigns and violent content spread on its services, prompting calls for new regulations around..