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Lt. Col. Karl Duerk, chief of wing plans with the 155th Air Refueling Wing, Nebraska National Guard base, Lincoln, Nebraska strides out at during the last leg of the course at the Lincoln Marathon on May 5, 2019, in Lincoln, Nebraska. “Members of our marathon team serve as fitness ambassadors to their units members and commanders, running is a common thread to success on the fitness assessment and in combat,” said Duerk. (U.S. Air Force Photo taken by Lt. Natasha Hilsgen)
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