Jack Dorsey, Co-Founder Of Square And Twitter

Host Jessica Harris speaks with Jack Dorsey, the co-founder of Square and the social networking service Twitter. Square is a financial services company that allows any merchant to accept credit card payments through a device that plugs into a smartphone's headphone jack.

Harris also speaks with Michael and Rick Mast, the founders of the artisanal chocolate company Mast Brothers Chocolate in Brooklyn.

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