The Department of Energy says the potential for wind power is greatest in middle America, where strong, steady breezes blow across the prairie. But the wind farms built there often have to send their electricity across several states to find the homes and businesses that need it. So how can energy from small-town wind turbines reach big city power sockets?

Correspondent Lee Patrick Sullivan goes inside the Midwest power grid's control room and meets the people harnessing wind's power and moving it across the nation.

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