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Published April 29, 2014, 12:00 AM

David Petraeus, right, and Kelly Schmidt

Retired four-star general and former CIA Director David Petraeus participates in a discussion about North Dakota oil development in Williston on Tuesday, April 29, 2014. He was hosted by North Dakota State Treasurer Kelly Schmidt. Submitted photo

Read the article: Petraeus visits N.D.’s ‘energy revolution’