"The best computer ever made is right here, " he says, tapping his head.

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"You need to be strong up here, " Riner adds, tapping his head.

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He came to enjoy doing tricks like tossing a team mate above his head, which required tapping into the power of an athlete who was moving in the same direction simultaneously.

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After tapping into an unfulfilled passion for international public affairs, her resolved confidence and managerial talent put her at the head of the World Food Programme, and then in 2008, into a position as a senior manager at the UN.

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