Masked Martian Girls: Mine & Historical Like girls from Mars are these “top women” at U.S. Steel’s Gary, Indiana, Works. Their job is to clean up at regular intervals around the tops of twelve blast furnaces. As a safety precaution, the girls wear oxygen masks., 1940 – 1945 Share this: Click to share on X (Opens in new window) X Click to share on Facebook (Opens in new window) Facebook Like Loading... Related