The land where he needed to build his canal was owned by Colombia and they would not allow it.
Secondary; The events are 100 years apart. There is virtually no chance of it being primary.
It froze Japans financial assets, we didnt want to interfere majorly because we were still in the middle of the depression. We didn't bomb Hiroshima until the bombing of Pearl Harbor (god bless the fallen troops) thats when we declared war against them and the first troops were sent in.
The <span>availability of cheap books greatly advanced the spread of learning in the renaissance since it made knowledge available to the lower classes instead of only the elite--as had been the case in the past. </span>
It is controversial because the President can pardon anyone! Take Nixon and Goldwater for example. Nixon was convicted of spying on th opposite party. Nixon stepped down, but was still charged. When Goldwater became president, he pardoned Nixon of all of his charges which caused a huge uproar. That's fair, right?