https://www.cnbc.com/2017/10/04/zuckerberg-sandberg-not-likely-to-testify-before-congress-source.html >Facebook CEO Mark Zuckerberg and COO Sheryl Sandberg are unlikely to testify before Congress early next month, when Facebook will face a grilling on how Russia-based groups used the company's ad-buying technology to influence the 2016 U.S. election, a source familiar with the situation told CNBC. >While the company hasn't finalized who will represent Facebook at a hearing of the Senate Intelligence Committee on that date, it probably won't be either of its top two executives, said the source, who spoke on condition of anonymity because a final decision has yet to be made.