File:United States Aeronautical Reserve, one of first military airplane demonstrations in front of military and signal officers in Washington, DC, October, 1910.jpg

Summary
USA government approved military photo in 1910, photo property of USA government, but printed in several publications including the Air-Scout. There may be semi-copyrights on this, but they probably expired, and this photo would have had to have most likely been the property of the USA government/military as it would have had to be approved by them for any publications during that time period.
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