Category:United States Army Air Service observers of World War I
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- Per documentation, observers can be identified as wearing one wing; pilots wear two.
Media in category "United States Army Air Service observers of World War I"
The following 2 files are in this category, out of 2 total.
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111-SC-22368 - NARA - 55204435.jpg 8,540 × 5,762; 15.45 MB
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111-SC-22373 - NARA - 55204445.jpg 8,540 × 5,762; 15.09 MB