Da Lua para a Terra: alguém está a ouvir?
One small word is one giant sigh of relief for Armstrong: As Neil Armstrong became the first man to walk on the Moon in 1969, a global audience of 500 million people on Earth watched and listened with bated breath.
"That's one small step for man, one giant leap for mankind," they heard him say as he dropped from the ladder of his spacecraft to make the first human footprint on the lunar surface.
But from the moment he said it, and for 37 years since, debate has raged over whether the Nasa astronaut might have fluffed his lines.
Mr Armstrong has long insisted that he meant to say "one small step for a man..." ? which would have been a more meaningful and grammatically correct version, free of tautology. But even the astronaut himself could not be sure.
"Damn, I really did it. I blew the first words on the Moon, didn?t I?" he is reported to have asked officials later, amid uncertainty as to whether he had blown the moment or simply been drowned out by static interference as his words were relayed 250,000 miles back to Earth.