Saigon, Cochin China [Vietnam]. Photograph, 1981, from a negative by John Thomson, 1867. https://www.rawpixel.com/image/13991467/photo-image-cloud-plant-personFree Image from public domain licenseSnowy Valley, Chekiang province, China. Photograph, 1981, from a negative by John Thomson, 1871. https://www.rawpixel.com/image/14018414/photo-image-plant-tree-artFree Image from public domain licenseBaca County, Colorado. April 14, 1935. Dust storm. Colorado. Sourced from the Library of Congress. https://www.rawpixel.com/image/12266313/photo-image-sky-ocean-public-domainFree Image from public domain licenseB-29 Super Fortress machine gun ammunition. Sourced from the Library of Congress. https://www.rawpixel.com/image/12297806/photo-image-person-sky-airplaneFree Image from public domain licenseBleak, mountainous Attu had a population of only about forty people prior to the Japanese invasion. As yet there has been no… https://www.rawpixel.com/image/12301161/image-flowers-frame-plantFree Image from public domain licenseB-29 Super Fortress displayed to public for first time at Washington National Airport. Sourced from the Library of Congress. https://www.rawpixel.com/image/12298048/photo-image-person-sky-airplaneFree Image from public domain licenseDust storm. Baca County, Colorado. Sourced from the Library of Congress. https://www.rawpixel.com/image/12266151/photo-image-smoke-animal-public-domainFree Image from public domain license