How did the united states feel about the soviet union's contributions to the space race?

It was a great rivalry between the two in the 20th century.  they fought each other for years for the supremacy in space flight technologies, with each country launching satellites and manned missions into  space.  The goal of both countries was to put a man on the moon, which the united states did in 1969 which made the soviets upset basically 

What are they! i have no idea lol