A general view of a Chipotle store sign in downtown Portland.
A general view of a Chipotle store sign in downtown Portland. - 
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Chipotle's  third-quarter earnings were not so hot recently. A graph of its stock over the past week or so looks like a playground slide. The restaurant chain is dealing with an E. coli outbreak. And beyond that, big questions are being raised about its supply chain. High-quality ingredients have always been a part of Chipotle's sales pitch. Roberto Ferdman covers food and economics for the Washington Post. He spoke to Lizzie O'Leary about what this means for the future of fast food.

Click the above audio to hear the full interview. 

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