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Shares in the social networking giant were weighed down by the start of options trading and negative sentiment around the stock.

Facebook's founder is no longer one of the world’s 40 richest people after his fortune fell from $16.2 billion on May 25 to $14.7 billion.

We all knew our Facebook profile pictures said a lot about us -- but this much?

Russia's tech geek prime minister anticipates Zuckerberg visit.

Facebook CEO Mark Zuckerberg delivers a keynote during a Facebook f8 Developer Conference at the San Francisco Design Center in September.

KIMIHIRO HOSHINO

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