The narrator says, "The silver wings that would carry Gene Kranz aloft were born not of laughter, but fire." This is a reference to the famous poem "High Flight" by RCAF pilot John Gillespie Magee; the poem's first lines are, "Oh! I have slipped the surly bonds of Earth, and danced the skies on laughter-silvered wings." See more
[about President Kennedy's goal to put a man on the moon by 1970
I couldn't believe it. This whole idea of doing it before this decade is out is absolutely ludicrous. And then, you think about it a little bit more, and you get away from the initial impressions, and you say, holy cow. What a challenge, what a job. This guy trusts us, when we haven't been able to put a man in orbit.