David Olson, the 28th Civil Engineer Squadron Fire Protection Flight chief, runs between obstacles during the Firefighter Challenge at Ellsworth Air Force Base, S.D., Oct. 6, 2017. During National Fire Prevention Week, multiple teams competed against one another on a course designed to test the strength, agility and precision of each member in the four-person teams. (U.S. Air Force photo by Airman 1st Class Thomas Karol)
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