"That's one small step for (a) man, one giant leap for mankind."

"The rockets that have made spaceflight possible are an advance that, more than any other technological victory of the…"

"With a partnership that includes 15 nations and with 68 nations currently using the ISS [International Space Station]…"

"Everything in space obeys the laws of physics. If you know these laws, and obey them, space will treat you kindly. An…"

"There is just one thing I can promise you about the outer-space program: Your tax dollar will go farther."

"If our intention had been merely to bring back a handful of soil and rocks from the lunar gravel pit and then forget …"

"I'm convinced that before the year 2000 is over, the first child will have been born on the moon."

"We will build new ships to carry man forward into the universe, to gain a new foothold on the moon, and to prepare fo…"

"Returning to the moon is an important step for our space program. Establishing an extended human presence on the moon…"

"Houston, Tranquility Base here. The Eagle has landed."