Sharyn Alfonsi reportson the ongoing water crisis in Flint, Michigan. Lesley Stahl shares the remarkable story of architect Chris Downey, who lost his sight, found a way to keep working and believes blindness has made him a better architect.And the world's number 1 tennis player, Rafael Nadal, takes Jon Wertheim back to his hometown on the Spanish island of Mallorca. Those stories on this week's "60 Minutes."

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