"Nonetheless, Scranton had travelled in space. He had known the loneliness of separation from all other human beings, he had gazed at the empty perspectives that I myself had seen."

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You need to identify the steps at which contamination can occur - those are the critical control points. You take steps to make sure that that doesn't happen. And you monitor and evaluate and test to make sure that your system is working properly. And if it's done diligently and done faithfully and monitored carefully, then they're producing safe food. And no astronaut of which I'm aware has ever gotten food poisoning in outer space.

— Marion Nestle