"There's no problem that can't be solved with enough ingenuity and effort."

"My father was a sportsman and a hunter, and he taught me to shoot when I was very young. I was always interested in what made things go."

"My mind is completely open. I don't know if there is life on other planets, but I think it's likely."

"I'm not interested in war, I'm interested in rockets."

"We must never forget that the space age has only just begun."