One of the Potsdam photos was the first to be transmitted in color by wire, ever!
Until then, only black and white photos could be transmitted by wire. Arthur Grant Anderson, the chief operator of the world wide Radio Photo Section of the US Army Signal Corps was at the Pentagon Building in Arlington, VA, on the receiving end of the first color news photograph ever transmitted and received by radio waves on 7/26/45, showing Atlee, Truman, and Stalin. He received it from Master Sergeant Joseph E. Dunn, who was the Radiophoto Section Chief stationed in Berlin.
First Color Newsphoto transmitted and received on Radio Waves from Overseas. Potsdam Conference