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Thunderbirds Delta pilots perform Delta Loop maneuver during the Chicago Air and Water practice Show at Chicago, Ill., Aug. 19, 2016. (U.S. Air Force Photo by Staff Sgt. Jason Couillard) www.dvidshub.net. Original public domain image from Flickr
Thunderbirds Delta pilots perform Delta Loop maneuver during the Chicago Air and Water practice Show at Chicago, Ill., Aug. 19, 2016. (U.S. Air Force Photo by Staff Sgt. Jason Couillard) www.dvidshub.net. Original public domain image from Flickr
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