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Crain’s Chicago Business managing editor Ann Dwyer reports on United Airlines' efforts to quell 12 months of turbulence. McDonald's switches the Egg McMuffin’s margarine to butter with its new nimble approach. And there’s a possible front-runner to buy the iconic Tribune Tower.  

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(Eden, Janine and Jim / Flickr)

Will you be able to own a piece of the Tribune Tower? Crain's Chicago Business has the story.

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