On this day in 1867, African American men were granted the right to vote in Washington, DC.
On this day in 1940, during World War II, Britain introduced food rationing.
On this day in 1963, Leonardo da Vinci's Mona Lisa was exhibited in the United States for the first time, at the National Gallery of Art in Washington, DC
And on this day in 1971, Bowing to international pressure, President of Pakistan Zulfikar Ali Bhutto released Bengali leader Sheikh Mujibur Rahman from prison, who had been arrested after declaring the independence of Bangladesh.