it took the company a motto react. facebook yesterday apologized and said that now you can entirely opt out of this program. but the loss of trust was damaging. it was officially time to bring in the operator that many believe zuckerberg needed to run facebook. that person was sheryl sandberg. but geting her to come to facebooken wouldn t be easy. she still had a big job at google. so they couldn t be seen together. we spoke to her a new report now questions her leadership. we couldn t go to his house because he literally had an apartment that was one room with a fuse ton on the floor. i don t think he even had a chair. so he came to my house for d dinner. he would show up after my kids went to bed and i would have to kick him out and say, okay, it s 11:30. i need to go to bed. leave. at the time, you re 38 years old. you re managing 4,000 employees
what any of us could imagine. facebook had the worst day in four years. reporter: it was a turn point and facebook s stock price plunged and the anger only amplified as days went by and there was silence from the upper ranks until marc feinly decided to talk. senior tech laurie siegel got this exclusive interview. what happened? what went wrong? when we come back. when i walked through a snowstorm for a cigarette,
that tell your mind, i have to look at the car crash. the way facebook sees the car crash, that s what you want and start feeding people car crashes over and over again metaphorically. that s the product of their business model. reporter: the longer people stay on facebook feeds the more money facebook makes. their business model is how do i keep people on the street and how do i make the people as easy to influence as possible for the advertiser. the problem if you re not academicing if you have 6 million advertisers cycling through the system, how do you know if some advertisers are iran, russia, china, saudi arabia. reporter: in fact, facebook did find russia s internet agency did spend money on ads to target voters. the twitter and facebook accounts looked to be run by the same black activists were the work of russians. reporter: after denying,
take long for harvard to shut down the site. mark actually became a celebrity on campus. i was like, oh, mark, you kind of probably put that out there and didn t really think it through that well. but i mean, he always saw a need for something and his gut instinct was always, let s get this out there and then make it perfect. this idea of creating and breaking in the name of connecting would be a theme that would only amplify a decade later as the stakes got higher. but 15 years ago at harvard, it motivated mark zuckerberg s next life changing creation. somewhere along one of these path wways might have been wher the idea for facebook started. harry lewis was mark s computer science professor and a dean at harvard. when the students arrived at campus in the fall, they were
to testify november 18th and it started. they built a mock hearing room. he worked hard to prepare and was ready. that was as high stage as it gets. facebook s ceo, mark zuckerberg, just hours away from testifying. it s all historic, the way it was for the tobacco execs in 1994. they had to bring in extra row of chairs for the senators because there was so much interest. we re listening. america is listening, and quite possibly, the world is listening, too. reporter: and wondering could zuckerberg, who historically had a hard time with high pressure public moments deliver. we didn t take a broad enough view of our responsibility. that was a big mistake. it was my mistake, and i m sorry. i started facebook. i run it, and i m responsible for what happens here.