Erwin Blumenfeld, 1933, Adolf Hitler, Collage / Germany. In the 1930s, he published collages mocking Adolf Hitler. One of his 1933 photocollages of Hitler was exhibited in Paris in 1937 but had to be withdrawn because the German Ambassador was so incensed by it. The Germans got to see it anyway. The United States Air Force dropped millions of copies of this photograph over German cities in 1943. He was interned in a concentration camp in 1940 because he was Jewish. In 1941, he escaped.