Why did the U. S panic at this? How did the U. S. respond?

What did Yuri Gagarin, John Glenn and Neil Armstrong do? ​

They panicked because, with nuclear weapons, global destruction could happen. In order to try to prevent that, the US began a space race to see which nation will go to Space. Yuri Gagarin, John Glenn and Neil Armstrong all were partners in which leaded a mission to land on the moon.

Explanation:

Mark me brainliest pls

b) race riots in several cities

answer; andrew jackson approved nullification by signing it into law,and john calhoun opposed it saying it was unconstitutional;