The document discusses Roger Fenton, recognized as the first war photographer, and his impactful photographs from the Crimean War (1853-1856), which changed public perceptions of war. It highlights the methodologies used by filmmaker Errol Morris to analyze Fenton's work through a historical thinking process that includes sourcing, contextualizing, close reading, and corroborating with experts. The text also emphasizes the technological limitations of photography at the time and the artistic elements incorporated by Fenton.