Independent scholar Lisa Kurzner discusses Alfred Stieglitz's photographs of artist Georgia O'Keeffe. Educated in Berlin, Stieglitz studied engineering and photography before returning to the US at the turn of the century and opening the 291 gallery. He pioneered the art of photography, and single-handedly introduced America to the works of Picasso, Matisse, and Cezanne at the gallery. Stieglitz took more than 300 portraits of O'Keeffe between 1918 and 1937. Most of the more erotic poses would be in the first few years of their marriage.