After resisting previous calls to testify, Zuckerberg agreed to come to Capitol Hill this month after reports surfaced - and the company confirmed - that Cambridge Analytica had gathered Facebook users' data.
Researchers say it's unlikely that Facebook will upset its business model, which allows advertisers to precisely target users, even as the company clamps down on the information it passes to app developers.
"Our goals are to understand Facebook's impact on upcoming elections - like Brazil, India, Mexico and the United States midterms - and to inform our future product and policy decisions", Facebook executives said in a blog post.
In prepared remarks released by a congressional panel, Zuckerberg admitted he was too idealistic and failed to grasp how the platform - used by two billion people - could be abused and manipulated. And in March, it emerged that Cambridge Analytica, a political research firm used by Trump's campaign, illicitly obtained the personal data of up to 87 million users. Zuckerberg is set to appear before a joint hearing of the Senate Judiciary and Commerce committees on Tuesday afternoon followed by a House Energy and Commerce Committee hearing on Wednesday morning. The CEO will face questions over the data harvesting scandal, and also be asked about the spread of misinformation on his platform - "fake news" - and interference with elections.
In the testimony Zuckerberg explains, "It's clear now that we didn't do enough to prevent these tools from being used for harm as well".
Directly contradicting White House lawyers, Trump says he's considering firing Mueller
Last June, Trump tried to order Mueller's termination, but backed off after White House counsel Don McGahn threatened to resign. Investigators also seized a computer, phone, personal financial records, and attorney-client communications.
Zuckerberg was also scheduled to meet with Senate Judiciary Chairman Chuck Grassley, R-Iowa, and Senate Commerce Committee Chairman John Thune, R-S.D., ahead of Tuesday's hearing.
Cambridge Analytica whistleblower Christopher Wylie previously estimated that more than 50 million people were compromised by a personality quiz that collected data from users and their friends. "It was my mistake, and I'm sorry", he wrote.
Zuckerberg will spend two days answering lawmakers' questions about the powerful social network he helped create more than a decade ago, and whether the company is doing enough to protect users' privacy.
According to Reuters, Facebook will try to defend calls to regulate the internet-based company. Angus King (I-Maine) told lawyers for Facebook, Twitter and Google that he was "disappointed that you're here and not your CEOs because we're talking about policies and policies of the companies".
Facebook has been in troubled waters ever since the Cambridge Analytica's data breach has been reported.
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Worldwide, " Black Panther " has earned $1.29 billion and now stands as the tenth highest grossing film at the global box office . Jordan , Danai Gurira, Daniel Kaluuya, Letitia Wright, Winston Duke, Angela Bassett, Forest Whitaker and Andy Serkis.
At the heart of this initiative will be a group of scholars who will define the research agenda; solicit proposals for independent research on a range of different topics; and manage a peer-review process to select scholars who will receive funding for their research -- as well as access to privacy-protected datasets from Facebook which they can analyse.
"It's not enough to just connect people, we have to make sure those connections are positive", Zuckerberg plans to say in his testimony.
Some Republican lawmakers are pressing Facebook to support the Honest Ads Act, a bi-partisan bill to bring greater transparency to online political ads, along with more sweeping regulations.
The flurry of activity highlights Facebook's rush to get its house in order before Zuckerberg's high-stakes debut testifying on Capitol Hill this week.
Zuckerberg's full testimony is below.
In second blaze this year, a fire at Trump Tower kills resident
After the fire, Trump's former opposition to a law requiring sprinklers in residential high-rise buildings came under scrutiny. The Fire Department of the City of New York (FDNY) advised that an apartment resident had suffered serious injuries.