[Untitled photo, possibly related to: Holabird ordnance depot, Baltimore, Maryland]. Sourced from the Library of Congress. https://www.rawpixel.com/image/12294259/photo-image-person-public-domain-manFree Image from public domain licenseWinslow, Arizona. Looking through the windshield of a diesel freight engine pulling out of the Atchison, Topeka and Santa Fe… https://www.rawpixel.com/image/12293696/photo-image-sky-smoke-public-domainFree Image from public domain licenseThe San Francisco peaks, in the Sierra Nevada range near the California border, seen through the engineer's window of a… https://www.rawpixel.com/image/12292287/photo-image-border-sky-lightFree Image from public domain license[Untitled photo, possibly related to: A plane in front of the huge hangar. Municipal airport, Washington, D.C.]. Sourced… https://www.rawpixel.com/image/12279612/photo-image-person-plane-public-domainFree Image from public domain licenseThe captain is in his place and in a few minutes the plane will take off. Sourced from the Library of Congress. https://www.rawpixel.com/image/12278448/photo-image-person-plane-public-domainFree Image from public domain license[Untitled photo, possibly related to: Waiting for the signal to take off. Washington, D.C. municipal airport]. Sourced from… https://www.rawpixel.com/image/12278269/photo-image-person-airplane-public-domainFree Image from public domain license[Untitled photo, possibly related to: Willliams, Arizona. The engineer, on the Atchison, Topeka and Santa Fe Railroad… https://www.rawpixel.com/image/12292957/photo-image-hand-person-public-domainFree Image from public domain license