The diagram shows a model of a nuclear change
which nuclear process does the model illustrate?
o
nuclear fission, because nuclei combine
nuclear fission, because a nucleus breaks apart
nuclear fusion, because nuclei combine
nuclear fusion, because a nucleus breaks apart

What is your question then

The soviet union beat the us to the first successful launch, with the october 4, 1957, orbiting of sputnik 1, and later beat the us to have the first human in earth orbit, yuri gagarin, on april 12, 1961. the "race" peaked with the july 20, 1969, us landing of the first humans on the moon with apollo 11