This image was acquired from
flickr and 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:
north american northamericano north american aviation northamericanaviation naa north american northamerican aviation aircraft airplane military aviation militaryaviation observation plane observationplane wright cyclone wrightrcyclone wright wrightr wright cyclone wrightcyclone wright cyclone wrightcycloner blackandwhite monochrome