Mark Zuckerberg

He posted that this year's personal challenge is to "have visited and met people in every state in the US".

The 32-year-old tech titan added that he needs to travel to about 30 states to fulfil the pledge.

His previous New Year challenges have included running 365 miles, reading 25 books and learning Mandarin.

The US tour comes amid speculation that a future personal challenge by Mr Zuckerberg could include running for president of the United States.

In a post on his Facebook profile Mr Zuckerberg said he hoped to announce measures to tackle fake stories "soon".

He said this work "often takes longer than we'd like in order to confirm changes we make won't introduce unintended side effects or bias".

And he said that more than 99% of content on Facebook "is authentic".

"Only a very small amount is fake news and hoaxes. The hoaxes that do exist are not limited to one partisan view, or even to politics," he added.

When years ago, it wasn’t that big and Steve Ballmer, the then CEO of Microsoft, made a buyout offer to Mark Zuckerberg. He wanted to purchase Facebook when it was an “itsy-bitsy”. Ballmer recalled the story on CNBC’s Squawk Box.

Mark Zuckerberg turned down Ballmer’s $24 billion offer for Facebook to become a Microsoft company. And it appears he made the right decision.

“I respect that,” Ballmer told CNBC. “You have to have a willing seller.”

At a press conference in San Francisco, they said their ultimate goal was to "cure, prevent or manage all diseases by the end of the century".

The funds will be distributed by the Chan Zuckerberg Initiative, which they created in December 2015.

Tech leaders are increasingly turning their attention to health.

Earlier in the week, Microsoft said it intended to "solve" cancer by using artificial intelligence tools.

Running a mile every day? Easy.

But building a personal assistant from scratch? Apparently that's hard.

Facebook (FB, Tech30) CEO Mark Zuckerberg said on Monday that he hopes to finally demo a butler powered by artificial intelligence next month after making it his New Year's challenge to build the service.

The Facebook (FB, Tech30) CEO announced his trip on Wednesday afternoon and said he will hold a live question and answer session while there on Monday. Anyone who has a question, Italy-related or otherwise, can leave it in the comments section of his post.

An image of the Facebook CEO, photoshopped to appear as if he had been shot in the face by the controversial pellet guns used by security forces in Indian-administered Kashmir, has been widely shared on social media in the last few days.

It follows a raising of tensions in Indian-administered Kashmir. Both India and Pakistan claim Kashmir in its entirety. Many people in the Indian-administered territory - especially in the Muslim-majority Kashmir valley - do not want it to be governed by India.

Andela provides necessary training and pairs them with top technology companies like Microsoft, Facebook, and Google. Recently, Andela managed to secure Mark Zuckerberg and Priscilla Chan as its lead investors.

Mark Zuckerberg made headlines when he announced that he’ll be spending his 99 percent of Facebook shares on good causes like curing diseases, education, and connecting the world.

The company is asking shareholders to vote on a proposal that allows Zuckerberg's majority voting control to be terminated if he steps down or no longer occupies a leadership position at Facebook.

"These new terms thus ensure that we will not remain a founder-controlled company after we cease to be a founder-led company," Facebook said in a proxy statement filed to the Securities and Exchange Commission.

The figures from Morning Consult indicate that Zuck is top dog, with more likes than second-placed Tim Cook of Apple, Amazon head honcho Jeff Bezos, and Microsoft boss Satya Nadella.

Hoody enthusiast Zuckerberg had an approval rating of 48%, while Cook's topped out at 39%, Bezos at 38% and Nadella at 29%.

The Facebook founder is also the best known CEO, with only 31% of the 1,935 respondents stating that they had no opinion or had never heard of him.