Minnesota Public Radio slideshow:
An uncertain future
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Xcel Energy's Mike McMullen manages Xcel's Control Center in Minneapolis. He oversees transmission issues for more than 1.3 million Xcel customers. (MPR Photo/Rob Schmitz)

Xcel Energy's Mike McMullen manages Xcel's Control Center in Minneapolis. He oversees transmission issues for more than 1.3 million Xcel customers.

(MPR Photo/Rob Schmitz)
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