What do you know about the 3rd man on the Moon mission?

A half-century ago, in the middle of a mean year of war, famine, violence in the streets and the widening of the generation gap, men from planet Earth stepped onto another world for the first time, uniting people around the globe in a way not seen before or since.

Hundreds of millions tuned in to radios or watched the grainy black-and-white images on TV as Apollo 11's Neil Armstrong and Buzz Aldrin set foot on the moon on July 20, 1969 , in one of humanity's most glorious technological achievements. Police around the world reported crime came to a near halt that midsummer Sunday night.

Astronaut Michael Collins, who orbited the moon alone in the mother ship while Armstrong proclaimed for the ages, "That's one small step for man, one giant leap for mankind," was struck by the banding together of Earth's inhabitants.

"How often can you get people around our globe to agree on anything? Hardly ever," Collins, now 88, told The Associated Press in a recent interview. "And yet briefly at the time of the first landing on the moon, people were united. They felt they were participants."

He added, "It was a wonderful achievement in the sense that people everywhere around the planet applauded it: north, south, east, west, rich, poor, Communist, whatever."

That sense of unity did not last long. But 50 years later, Apollo 11 — the culmination of eight years of breakneck labor involving a workforce of 400,000 and a price tag in the billions, all aimed at winning the space race and beating the Soviet Union to the moon — continues to thrill.

"Think of how many times you hear people say, 'Well, if we could land a man on the moon, we could certainly do blah, blah, blah,'" said NASA chief historian Bill Barry, who like many other children of the 1960s was drawn to math and science by Apollo. "It really, I think, has become a throwaway phrase because it gets used so often. It gets used so often because I think it had an impact."

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