Detailed Instructions: You are given a passage. You need to construct a question about the information present in the passage. Construct a question in such a way that (i) it is unambiguous, (ii) its answer is the whole paragraph. Avoid creating questions that can be answered correctly without actually understanding the paragraph.
Q: Yes. I believe the original idea was to build a rocket base from which to explore the solar system. But somebody realised the same thing could be done from Earth via an orbiting space station for a fraction of the cost.
The only other reasons for going to the moon were -
1. To stop the Russians setting up a military base there.
2. To collect moon rocks.
When the US realised that a Russian moon base wasn't practical, and they had souvenired as many moon rocks as they were ever likely to need, they never bothered to go back.
A:
Why did the U.S. stop sending people to the moon?