Lincoln and Douglas square off for the first time, Oldsmobile begins production, Hawaii becomes a state, and The Mona Lisa and the Mars Observer go missing, all on this day.
1940: Exiled Russian revolutionary Leon Trotsky dies from blood loss and shock the day after an assassination attempt by Spanish-born Soviet agent Ramón Mercader. Mercader had attacked Trotsky with an ice axe on the orders of Joseph Stalin.
Warner Bros. Pictures
Andrea De Stefani/SXC
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