"We know for a fact that we are alone in the universe. So why waste money on space exploration?" said the new World Government after they decided the UFO found on the moon was merely an undocumented prototype from before the nuclear wars. They wanted nothing to do with space, shut down the last interstellar exploration program and banished the genetically engineered crew into space. But out there, the so-called mutants found something.
You can shut your doors to the world. But one day, the world will come knocking.