The successful attempt to put the satellite Sputnik into space confirmed the fear of the US citizens that the Soviet Union was capable of potentially placing weapons into space (like missile-technology satellites, etc).
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The Renaissance was a very important period of European culture, artistic, political, an economic rebirth.
It was significant in the development of Western Europe and the impact it had was immense. The Renaissance not only influenced the worlds of art, music, and literature, but also the worlds of politics, religion, and society.
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"No one knew for sure how to get to the moon, how to land, or get home."
A lot of historians believe the battle of Fort Sumter was the start of the war, as it was the first official battle. However, there were zero casualties.
A lot of other people believe when Lincoln was elected was the start, because that event led many southern states to secede very quickly.