Dropping the atomic bombs was a way of demonstrating America's power. Also, the Japanese refused to surrender after the first bomb was dropped on Hiroshima so the President was following through on his threat.
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Answer: Columbus wanted to find a new route to India, China, Japan and the Spice Islands.
Explanation: If he could reach these lands, he would be able to bring back rich cargoes of silks and spices.
It was built around 2560 B.C
