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:
united airlines unitedairlines boeing theophilus lee boeingtheophiluslee lee tlee training nc ford trimotor fordtrimotor at cnat aviation aircraft airplane airlines airliners stout metal airplane company stoutmetalairplanecompany stout ford ford atd trimotor fordatdtrimotor ford atd fordatd trimotor wright aeronautical wrightaeronautical