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John Green Hosts a Live Q&A with Bill Gates and Melinda Gates

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Streamed live on Feb 23, 2016

If you could have one superpower, what would it be?

This year Bill and Melinda Gates wrote their Annual Letter about two issues that will make a huge difference for the world's poorest people: energy and time. Learn more at http://b-gat.es/1LEuayi.

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