The Rome-Berlin-Tokyo axis was formed in 1936.
Copernicus was going up against everything and everyone, namely the Church. Copernicus would put forth the idea the heliocentric universe. This meant that the sun was at the center and not the earth. This could be taken to mean (and was by many) that God had not placed Man at the Center of the Universe. The idea that there was more that could occupy God than our existence and we were not the most important creature or thing was mind blowing.
The disaster at Chernobyl was a nuclear accident in Ukraine in 1986.
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With the death of President Franklin D. Roosevelt on April 12, 1945, Vice President Harry S. Truman assumed the Oval Office. He surely knew he faced a difficult set of challenges in the immediate future: overseeing the final defeats of Germany and Japan; managing the U.S. role in post-war international relations; supervising the American economy's transition from a war-time to a peace-time footing; and maintaining the unity of a fractious and powerful Democratic Party.
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