Men of war artwork?

[weequayx]

Where can I find the artwork that is in the intros to all of the Soviet missons as well as the other campaigns. Some look like war photographs while the greater portion appear to be drawings which really intrigues me. I've searched up and down and cannot find any of the pictures online or in the game files. Surely someone knows where they are located. It would be a shame for such seemingly amazing artwork to not be readily available to the fans.