I believe the Project Mercury was the first program that first sent two people into Orbit.
It was the Soviet Union that put the two people to explore the Orbit.
The phrase that best completes the statement given would be "generativity versus stagnation stage." This belongs to the seventh stage of the psychosocial development wherein adults and the elderly belongs. Furthermore, these adults are taught on how to pursue their own careers and establish their own families.
All of them were split because each of those countries were being controlled by the big four which were the former allies. Hope that helps