"Little by little, they grew closer, steady, as if on rails, and I thought 'What a beautiful sight,'one that had to be recorded. As I reached for my Hasselblad, suddenly the Earth popped up over the horizon, direc tly behind Eagle. I could not have staged it any better, but the alignment was not of my doing, just a happy coincidence. I suspect a lot of good photography is like that, some serendipitous happenstance beyond th e control of the photographer. But at any rate, as I clicked away, I realized that for the first time, in one frame, appeared three billion earthlings, two explorers, and one moon. The photographer, of course, was discreetly out of view."

Michael Collins in "Through the Eyes of the Astronauts"