The US economy started booming in the 1920s because WWI was just ended/coming to a close and all of the money that was spent on war supplies made companies and workers richer as well the war debt and damage of our alies needing supplies that we gave giving us even more money and prosperity.
1. 1950 Korean war begins.
2.1954 First nuclear powered submarine launches: USS Nautilus
3. 1958 NASA is formed
4. 1961 JFK becomes president
<span>5. 1963 John F. Kennedy killed in Dallas
Hope this helps! :)</span>
I believe it is equality. I am not sure in what context this is asking, but I am pretty sure it is equality.