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:
airplane airshow nc nx city of philadelphia cityofphiladelphia at cnat at at aviation aircraft airliner airliners airlines transcontinental air transport transcontinentalairtransport tat tat twa radio corporation of america radiocorporationofamerica rca ford star air lines starairlines ford atb fordatb ford atb trimotor fordatbtrimotor