The Manhattan Project was a turning point in American History because of what would happen without the Atomic Bomb. Ex: In WWI, Trench Warfare was the most common type of fighting style. Trench Warfare is basically the art of throwing men at each other, knowing they would die. They would fight until the other had to give in, or until they would begin to run out of men. And with the power of this bomb, just a single one. You could wipe out millions. Without a single causality to your own people. But this Bomb could also be used in the wrong hands. Kill millions without warning or reason. But as it stands we shouldn't have to worry about this issue because the only dropping of this bomb is in Hiroshima and Nagasaki.