Explore Chicago Collections
https://explore.chicagocollections.org/records/?f3-topics=Government+%26+Leadership%3A%3AMilitary&f4-topics=Natural+%26+Built+Environments%3A%3AAir+Travel&f2-topics=Government+%26+Leadership%3A%3AMilitary&f5-topics=Natural+%26+Built+Environments%3A%3AAir+Travel&browse-names=yes&f1-cities=Chicago&sort=title&f6-types=Archival%20Collections