Poster of two U.S. Army Air Service servicemen with aircraft, a balloon, and an airship, circa 1918-1919. Art by Warren Keith, produced by the Edwards & Deutsch Litho. Company.
Text: "Join the Air Service / 'Give 'er the gun / Learn. Earn."
Photograph of ZMC-2, the U.S. Navy's Zeppelin Metal Clad airship, in a hangar, circa 1929-1931. Caption: "Metalclad Airship ZMC-2. Built by Aircraft Development Corporation, Division of Detroit Aircraft Corporation."Part of a photograph album related…