Apollo thought about being the first man to the moon because he also wanted to make his nation be the first to the moon. So when someone hit him with the idea, he already thought about it.
In August 21, 1957 the first missile was launched. They called this missile the intercontinental ballistic missile or the ICBM. Everyone wanted to be the first nation to the moon.
In October 4, 1957 they started making advanced satellites up in space. They said that this was the first artificial satellite. They also said that it was the first signals from space.
In November 3, 1957 the first dog got into orbit. They were experimenting what that would do in order to send the first man to space. So they thought this was the best idea.
In January 31, 1958 the first U.S satellite was used. It was very helpful pretty much as soon as the US built it. It was the detection of Van Allen radiation belts.
As a result Apollo made it to the moon and the US was the first successful nation to travel to the moon. Apollo made himself and the whole country proud of him. All nations were jealous and tried to do as he did.