Instagram's co-founder, Kevin Systrom
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Systrom: Instagram's ambitions to grow

"Three hundred million is just the beginning," Instagram's co-founder Kevin Systrom says of the users who regularly use his photo-sharing service.

Speaking to BBC Click Systrom tells of Instagram's ambitious growth plans, reveals a key problem for the platform and talks about his relationship with Facebook's Mark Zuckerberg.

More at and @BBCClick.

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