Naturalist and explorer George Cherrie kept a meticulous diary of the journey down an uncharted river in the Brazilian Amazon, which he took with Theodore Roosevelt in 1914.
Theodore Roosevelt's great-grandson discusses the president's love of Lincoln, penchant for Hungarian poetry, and the book that inspired his conservation legacy.
The stern-faced poster of Uncle Sam demanding “I Want You,” shows no desire for quiet retirement; today the icon remains as recognizable and remixed as ever.