"I think a lot of times we don't pay enough attention to people with a positive attitude because we assume they are naive or stupid or unschooled."

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Globalisation means many other countries are asserting themselves and trying to take over leadership. Please don't ask Americans to let others assume the leadership of human exploration. We can do wonderful science on the Moon, and wonderful commercial things. Then we can pack up and move on to Mars.

— Buzz Aldrin