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:
smithsonian institution smithsonianinstitution airplane airmail junkers pilot junkerslarsen junkerslarsen junkers s. junkerssl junkers jl junkersjl jl jl aviation aircraft lent lblent junkers larson junkerslarson mail hat national postal museum nationalpostalmuseum mail across the commons mailacrossthecommons Date July Object number