EntityQ17075372· pop 5· linked from 25 articlesExplorer IISign in to save1935 American high-altitude balloonConnectionsWorld War IIConceptFranklin D. RooseveltPersonSouth DakotaEntityInternational Standard Book NumberEntitydigital object identifierEntitycosmic radiationEntitystratosphereEntitySmithsonian InstitutionEntityNational Geographic SocietyEntitybibcodeEntityJohn J. PershingEntityweather stationEntityBlack HillsEntityliquid oxygenEntitycurvatureEntitysolar luminosityEntityGoodyear Tire and Rubber CompanyEntitycold frontEntityNational Institute of Standards and TechnologyEntityterminal velocityEntityCategoriesAircraft first flown in 1935Aircraft flown onceAviation recordsIndividual balloons (aircraft)National Geographic Society