After surveying possible sites, the sculptor chose Mount Rushmore in the Black Hills as the location and four key Presidents as his subject matter. Description from modernhistorian.blogspot.co.uk. I searched for this on bing.com/images
Charles C. Ebbetts - Construction workers eat their lunches atop a steel beam 800 feet above ground, at the building site of the RCA Building in Rockefeller Center in New York, Sept. 29, 1932. And, the previously unpublished version of the iconic photograph.