"As much as we've enjoyed it up here, we're also starting to look forward to seeing all the people back on Earth that we miss and love so much."

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We only went to the moon for military reasons. The space enthusiasts of the day kept saying, "Oh, we're on the moon; we should be on Mars in ten years." That's if it was driven by exploration, but it's never been driven by exploration.

— Neil deGrasse Tyson