Colin Stretch, Facebook general counsel, testifies during a U.S. Senate Intelligence Committee hearing looking into Russian meddling in the 2016 U.S. Elections via the use of social media, on Wednesday, Nov. 1, 2017. (Photo: Diego Radzinschi/ALM) post “embraces the broader responsibility” CEO Mark Zuckerberg leader of the legal department in 2013 Facebook backlash Cambridge Analytica scandal Russia's alleged use told the committee former Sidley Austin