A US naval base was bombed by Japanese planes in 1941, and thank Christ that happened otherwise the US would not have entered WWII and the whole thing would probably have ended differently. Four years later in order to bring the war to a speedy end, Harry S Truman ordered the dropping of atomic bombs on Hiroshima and Nagasaki. This resulted in a loss of life of around a quarter million. It was justified at the time (and still by many) as probably saving millions of lives in the long run. Japan were not keen to surrender. Between 1942 and 1946, the US government interned around 110,000 people of Japanese extraction, 62% of whom were American citizens. So I think it's safe to say that the earthquake of 11 March 2011 is not payback for Pearl Harbor.
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