Because once the science of the nuclear bomb was discovered. It was rushed to be mass produced by Rosevelt for use on possible targets (ex: Hiroshima)<span />
One of the most important elements of the Northwest Ordinance of 1787 was that the Federal government would be sovereign and would expand westwards in hope of founding new states, instead of expanding existing states. This was important for the growth and expansion of the United States (had this not happened, the United States would not be half of what it is now). Another important aspect of the Northwest Ordinance of 1787 is that slavery was prohibited and this was basically the border between free and slave states.
The president that made thanksgiving a national holiday was Abraham Lincoln :)
Hope this helped.
