Artist Richard Mosse, 32, never dreamed he would photograph in the Congo. Nor did he anticipate working with infrared film. But in 2009, when he learned that color infrared film was slated to be discontinued, he saw a chance for a new way of working, and the two came together. “I was interested in [the film’s] original purpose as a military tool, but I was also drawn to its peculiar color palette,” he says. “I wanted to use it as a way of thinking through this conflict and the rules and conventions of war photography.”