Technology

Updated at 3:08 p.m. ET

After five hours of testimony before a joint session of two Senate committees on Tuesday, Facebook CEO Mark Zuckerberg returned to the Capitol for a second straight day of grilling — this time before the House.

When Facebook CEO Mark Zuckerberg testified before a joint Senate Committee on Wednesday, he led off with a mea culpa. Just a few paragraphs into his opening statement, he took personal responsibility for the disinformation:

On Monday, Facebook began notifying the up to 87 million users whose information may have been compromised and given to Cambridge Analytica. As Facebook CEO Mark Zuckerberg testifies before Congress Tuesday and Wednesday, lawmakers like Sen. Bill Nelson have raised privacy concerns.

Updated at 7:35 p.m. ET

Mark Zuckerberg faced dozens of senators — and the American television audience — to take "hard questions" on how Facebook has handled user data and faced efforts to subvert democracy.

"We didn't take a broad enough view of our responsibility, and that was a big mistake. It was my mistake, and I'm sorry," the co-founder and CEO of Facebook, uncharacteristically wearing a suit, said in his opening remarks. "I started Facebook, I run it, and I'm responsible for what happens here."

Facebook users have begun to see whether they're among the 87 million people whose information may have been compromised for use by a political research firm. For some, the news is good: "It doesn't appear your Facebook information was shared with Cambridge Analytica."

The notifications are appearing on Facebook's page about users' exposed data. The company had also said it would put the information at the top of users' news feed.

Fake news on Facebook didn’t start with the 2016 election. Nearly a decade ago, users posted dire warnings that the network was about to start charging users.

It wasn’t true. But would it have been so bad?

Instead of charging users, Facebook made its money by selling ads targeted to them. It enforces the old saying about the web that if you aren’t a customer, then you’re the product.

Facebook CEO Mark Zuckerberg will face Congress in two separate hearings this week, as his company grapples with intense scrutiny over privacy and security on the social media site. It will be Zuckerberg's first appearance on Capitol Hill.

On Tuesday afternoon, more than 40 senators will crowd into a hearing room, where members of the Senate judiciary and commerce committees will have four minutes each to question Zuckerberg. A similar scene will play out Wednesday, when he is set to appear before members of House Energy and Commerce Committee.

Facebook founder and CEO Mark Zuckerberg is preparing to testify Tuesday and Wednesday before lawmakers on Capitol Hill. They'll ask him how Facebook let the data of up to 87 million unknowing users get into the hands of the political firm Cambridge Analytica.

Facebook began notifying those users Monday. But this is just the latest controversy for the social network, famously launched from Zuckerberg's Harvard dorm room.

A federal grand jury in Arizona has indicted seven people behind the classified-ads website Backpage.com on 93 counts, including charges of facilitating prostitution and money laundering.

The defendants include founders Michael Lacey, 69, and James Larkin, 68, as well as other shareholders and employees. The indictment accuses the executives of presenting Backpage as a site to advertise escort services while knowing that "the overwhelming majority of the website's ads involve prostitution." The indictment says the site made over $500 million in "prostitution-related revenue."

When Facebook founder Mark Zuckerberg appears before Congress this week, he's kicking things off with an apology — an expansive one.

Facebook didn't do enough to prevent its platform from being used to do harm, and that goes for "fake news, foreign interference in elections, and hate speech, as well as developers and data privacy," Zuckerberg says. "We didn't take a broad enough view of our responsibility, and that was a big mistake. It was my mistake, and I'm sorry."

As the Facebook scandal over Cambridge Analytica's misuse of the personal data of millions of users continues to unfold, Facebook is suspending another data analytics firm over similar allegations.

According to reporting by CNBC, Cubeyou collected data from Facebook users through personality quizzes "for non-profit academic research" developed with Cambridge University — then sold the data to advertisers.

Facebook is notifying the 87 million users whose information may have been compromised and given to Cambridge Analytica.

NPR's Morning Edition wants to hear from Facebook users who have received such a notification. We would also like to know if you have ever thought about leaving Facebook or if you have deactivated your account for a period of time.

There are a lot of regrets coming out of Silicon Valley these days as the dark side of the tech revolution becomes increasingly apparent, from smartphone addiction to the big scandal involving the misuse of personal information from some 87 million Facebook users.

As Facebook founder Mark Zuckerberg prepared for two congressional hearings coming this week, he gave reporters a look at his crisis-management strategy.

"We didn't take a broad enough view of what our responsibility is," he said Wednesday, referring to Facebook policies that allowed political consultants to acquire data belonging to as many as 87 million Facebook users. "And that was a huge mistake. It was my mistake."

Robots have arrived at Bill and Carol Shuler's farm near Baroda, Mich., and life has taken a turn for the better.

"It absolutely changes your lifestyle. It gives you a life!" says Bill Shuler.

For decades — for the entire time that Bill and Carol have been married, in fact — the Shuler family's routine was practically set in stone: Get up at 3:45 a.m., clean the barn, feed the cows and milk them. Then get breakfast and take care of other work around the farm. At 3 p.m., go back to the barn to feed and milk the cows again.

As Franklin Delano Roosevelt was to radio with his reassuring "fireside chats" during the Great Depression, as John F. Kennedy was to television with addresses to the nation in moments of crisis, so too is Donald Trump a master of his mass medium of choice.

Trump proves his mastery of it daily. Sometimes hourly.

"There's really no way to understand the administration except through the president's Twitter account," says Jameel Jaffer, director of the Knight First Amendment Center at Columbia University Law School.

The entertainment value would appear to dominate.

It was a turbulent week for tech companies.