well-being. that's just not true. a top senator investigating facebook says zuckerberg should do his explaining to congress. >> if he has disagreements with frances haugen or the whistleblower, if he wants to explain these documents, thousands of them, his own research and reports that show how they are putting profits ahead of people and endangering children, he should come tell it to our committee and to the american people himself. >> reporter: facebook described haugen as a low-level employee who worked for the company for less than two years, had no direct reports and never attended a decision point meeting with c level executives. that prompting a response from a former senior facebook employee. well, i was there for over six years, had numerous direct reports and led many decision meetings with c-level execs. the perspective shared for algorithm mick regulation, research transparency and independent research to be valid for debate. n. the end, the buck stops with