The National Geographic-Army Air Corps balloon, Explorer II, prepares to take to the skies over South Dakota, U.S., in 1935
des liens bien intéressants, retrouvés dans mes archives >>
https://airandspace.si.edu/collection-objects/cabin-explorer-ii/nasm_A19370060000
https://en.wikipedia.org/wiki/Explorer_II
https://stratocat.com.ar/artics/explorer-e.htm
