Facebook CEO Mark Zuckerberg

Why Facebook's mission changed

And, of course, transforming media and politics by presenting news and opinion -- true and fake -- to billions of people around the world.

Now the Facebook CEO is acknowledging that connecting people online isn't enough.

Mark Zuckerberg says he's not running for public office

The 33-year-old billionaire wrote in a Facebook post that some users have asked if the trip means he's running for public office. Zuckerberg says he's not running for anything. Instead, he says the visits around the country are in order "to get a broader perspective.''

He said Facebook is looking to connect users beyond people they already know, and he wrote that it may be important that the platform connects users to `"people you should know.''

He describes those as people outside a user's social circle who he says ``provide a new source of support and inspiration.''

Avril Lavigne hits back at Mark Zuckerberg's Nickelback joke

He made a gag in a video teasing his artificial intelligence app, Jarvis, which is voiced by Morgan Freeman.

When the Facebook founder says "play some good Nickelback songs" Jarvis replies "I'm sorry Mark, I'm afraid I can't do that - there are no good Nickelback songs".

"Good. That was actually a test," Zuckerberg responds.

The singer, who is married to the band's frontman Chad Kroeger, took offence at the joke and got in touch with Facebook.

"Many people use your products - some people love them and some people don't," she wrote.

Zuckerberg can now talk to his AI, but it's still no Jarvis

Artificial intelligence is moving into our homes, particularly Mark Zuckerberg's. But this stuff of science fiction may still be more fantasy than utility for now.

The Facebook founder, who for the last year has been building a smart system inspired by the Iron Man character Jarvis as a virtual butler to run his household, has updated followers on the project's progress.

His conclusion so far? Hooking up artificially intelligent homes may not be ready for prime time, at least for most of us.

Mark Zuckerberg gives Pope Francis a drone

Mark Zuckerberg handed over a Facebook drone when he, and his wife Priscilla Chan, met Pope Francis on Monday.

"It was a meeting we'll never forget," Zuckerberg said. "You can feel [the Pope's] warmth and kindness, and how deeply he cares about helping people."