There's many answers for this question, as long as it's a similar word to disbelief. President Roosevelt's reaction was pretty much thinking, "This is unbelievable." So therefore, you can put disbelief or distrust.
I cant quite put it, but lots of people died from each side. I'm going to guess negative and here is my starting sentence.
The Spanish-American war was negative because lots of men, and women died from both sides.
I'm going to let you copy the sentence above for your TOPIC sentence. I hope this helped, but you need to know the rest.
The best answer would be "Using the atomic bomb would change the world forever by making it a more dangerous place."
All of the colonies except Cuba and Puerto Rico attained independence by the 1820's.