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This combo of file images shows Facebook CEO Mark Zuckerberg, left, and Tesla and SpaceX CEO Elon Musk. An online smackdown between tech titans Zuckerberg and Musk over the possible threat of artificial intelligence underlines how little most people know about the rapidly advancing technology. (AP Photo/Manu Fernandez, Stephan Savoia)

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FILE - In this Wednesday, July 17, 2013, file photo, Snooty the manatee lifts her snout out of the water at the South Florida Museum in Bradenton, Fla. The South Florida Museum posted on Facebook, Sunday, July 23, 2017, that Snooty died in a heartbreaking accident. No other details were given about the cause of death, but the museum said they were devastated and that the circumstances are being investigated. Snooty, the longest living manatee in captivity, died one day after a huge party to celebrate his 69th birthday. (AP Photo/Tamara Lush, File)

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This Monday, June 19, 2017, photo shows Facebook launched on an iPhone, in North Andover, Mass. Facebook is working on a way for news organizations to charge readers for articles they share and read on the social network. Facebook’s head of news partnerships, Campbell Brown, says the current plan is to require payments after reading 10 articles from a publisher through Facebook. Brown said at a conference in New York on Tuesday, July 18, 2017, that news organizations have been calling for subscription capabilities. (AP Photo/Elise Amendola)

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This Monday, July 10, 2017, photo shows Ohio and federal investigators following up on a lead in the Samantha Burns case, along Township Road 1466 in Chesapeake, Ohio. A search prompted by a Facebook video suggesting the body of Burns, a West Virginia college student last seen in 2002 is buried in Ohio has begun in a southeastern part of the state. The man who posted the Facebook video says his new wife wouldn't let him build a pond on property where they lived near Chesapeake, Ohio, later telling him Burns was buried there. (Ryan Fischer/The Herald-Dispatch via AP)

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This Monday, July 10, 2017, photo shows Ohio and federal investigators following up on a lead in the Samantha Burns case on, along Township Road 1466 in Chesapeake, Ohio. A search prompted by a Facebook video suggesting the body of Burns, a West Virginia college student last seen in 2002 is buried in Ohio has begun in a southeastern part of the state. The man who posted the Facebook video says his new wife wouldn't let him build a pond on property where they lived near Chesapeake, Ohio, later telling him Burns was buried there. (Ryan Fischer/The Herald-Dispatch via AP)

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In this photo released by Pakistan's Press Information Department, Friday, July 7, 2017, Pakistani Interior Minister Chaudhry Nisar Ali Khan, left, meets Vice President of Facebook Joel Kaplan in Islamabad, Pakistan. Pakistan???s interior ministry says that Kaplan has met with a Khan to apprise him about steps taken by popular networking site to remove content which authorities in this Islamic nation claim is against Islam. (Press Information Department via AP)

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Fort Worth Kayak Adventures owner Lori Tenery and her daughter have apologized for Facebook comments on the company's page that some interpreted as racist and anti-Semitic. (NBC DFW)

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In this Wednesday, June 21, 2017, photo, Facebook CEO Mark Zuckerberg speaks at the Facebook Communities Summit, in Chicago, in advance of an announcement of a new Facebook initiative designed to spur people to form more meaningful communities with Facebook's groups feature. (AP Photo/Nam Y. Huh)

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Facebook Chief Operating Officer Sheryl Sandberg speaks at the American Enterprise Institute in Washington on June 22, 2016. (Associated Press) **FILE**

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The Facebook logo is displayed on an iPad in Philadelphia on May 16, 2012. (Associated Press) **FILE**

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James T. Hodgkinson belonged to the Facebook group Terminate the Republican Party. (Facebook via Associated Press)

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FILE - In this May 25, 2017 file photo Harvard University President Drew Faust, left, and Facebook CEO and Harvard dropout Mark Zuckerberg, right, speak while standing for a photograph before the start of Harvard University commencement exercises in Cambridge, Mass. President Faust, who was the first woman to lead Harvard University, announced Wednesday, June 14 that she will leave her post after the upcoming academic year saying in a letter "it will be the right time for the transition to Harvard's next chapter, led by a new president." (AP Photo/Steven Senne, File)

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FILE - This Monday, July 25, 2016, file photo shows Yahoo and Verizon Wireless logos on a laptop, in North Andover, Mass. Verizon is buying Yahoo in hopes of challenging Google and Facebook in the digital advertising market by combining ad technologies and user profiles from Yahoo and the AOL business it already owns. But Google and Facebook are so much better at this that it’ll be tough for Verizon to do more than tread water. (AP Photo/Elise Amendola, File)

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Facebook, founded by Mark Zuckerberg, said the messages were tailored to be seen by people who had visited particular advertisers' sites and that none was targeted based on "personal information such as email addresses." (Associated Press/File)

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Reality Leigh Winner (Image: Facebook)

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Facebook CEO and Harvard dropout Mark Zuckerberg delivers the commencement address at Harvard University commencement exercises, Thursday, May 25, 2017, in Cambridge, Mass., (AP Photo/Steven Senne)

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Facebook founder Mark Zuckerberg says he is on a fact-finding mission to look into the lives of his customers, but politicos say the visits look like the sort of activity of someone preparing for a presidential run. (Associated Press/File)

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