Ford said he began his detective work two weeks ago after a bicycle ride in Ohio. As he rested, he reflected on a favorite topic from his days as a medical student: the Apollo 11 moon landing.
"When they started in talking about the phrase . . . . I thought that was pretty stupid," Ford recalled. "They just put a man on the moon, why worry about an 'a'? Later, I thought Armstrong was such a good pilot, so precise, it's unlikely he would actually screw up a line."
Ford's interest was fueled as well by his work as a Cable News Network anchorman more than two decades ago, when his duties included news coverage of NASA.
He used his computer to download the audio recording of Armstrong's words from a NASA Web site and analyzed the speech pattern with the GoldWave software. In the graphic tracing, he found a signature for the missing "a," evidence it was spoken and transmitted.
Ford then checked First Man and found Hansen's account of Armstrong's historic step off the lunar lander as well as the astronaut's explanation for the missing word. The account matched what he had found with the GoldWave analysis.
Ford contacted Hansen and compiled his findings in the format of a scientific paper.
"It was meant for all mankind, and it's important to have it correct," Hansen said of the phrase. "It's a concise, eloquent statement for the ages at a unique milestone for our species."