I'm mad at the weather. It's cold. Colder, in fact, than it should be. This is why I'm mad. If things were just as they should be, I wouldn't complain.
The Smithsonian has a fascinating article about the Masks for Facial Disfigurement Department, which fitted disfigured veterans of the Great War with prosthetic faces. One benefit of reading it online is that there's an accompanying video.