1940s (269)
Project Mogul Balloon Tests, New Mexico, USA, 1940s
Project Mogul (sometimes referred to as Operation Mogul) was a top secret project by the US Army Air Forces involving microphones flown on high-altitude balloons, whose primary purpose was long-distance detection of sound waves generated by Soviet atomic bomb tests. The project was carried out from 1947 until early 1949. It was a classified portion of an unclassified project by New York University (NYU) atmospheric researchers.
Pesticides, Crop Dusters, DDT, USA, 1940s - 1950s
Pesticides, Crop Dusters, DDT, 1940s - 1950s compilation
National Parks, USA, 1930s, 1940s, 1950s
170483 Yellowstone, 1940s. 160589 Yellowstone, 1940s. 170017 Yellowstone, 1950s. 2289 Yosemite, 1930s.
