I believe your answer is the iron curtain.
<span>The steamboat was invented because of the efficiency of a steam boat was much better than a simple paddle boat. You also didn't have to do as much work because it was steam powered. It also saved time on things and traveled faster, farther, and could carry more loads. </span>
Answer:
They liberated the people in Concentration Camps
It is one of the places that are vertices on the Earth.
I think a Pennsylvania but I’m not 100% sure.
