This image was acquired from
flickr. It was marked as Public Domain or CC0 and is free to use. To verify, go to the source and check the information there.
Keywords from Image Description:
outdoor Lieutenant David S. Ingalls USNRF First U.S. Naval Air Ace. From July to Sept while flying with RAF Squadron Ingalls shot down four enemy aircraft and an observation ballon. He was awarded the Distinguished Service Cross by the United States Distinguished Flying Cross by Britain and was made member of the French Legion