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:
john mcgrew johnmcgrew world war one worldwarone th aero group thaerogroup wwi ww plane doppelecker flieger weltkrieg spad aviation aircraft airplane biplane military aviation militaryaviation aerial photography aerialphotography aerial photograph aerialphotograph aerial photo aerialphoto trench warfare trenchwarfare world war worldwari