https://www.reuters.com/article/us-facebook-moves-chriscox/facebook-product-chief-cox-to-exit-as-focus-shifts-to-messaging-idUSKCN1QV313 >Facebook Inc's chief product officer and one of its earliest employees, Chris Cox, said on Thursday he is leaving the company, just days after Chief Executive Officer Mark Zuckerberg revealed a plan to pivot the world's biggest social network to an encryption-focused messaging company.