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The oft-quoted speech made by Neil Armstrong as he stepped onto the moon's surface has dogged him ever since. Though everyone at home heard him say a tautological 'That's one small step for man, one giant leap for mankind', Armstrong himself has always insisted that he actually said 'one small step for a man', which is more grammatical. In 2006, computer programmer Peter Shann Ford claimed to have isolated the speech and identified a trace of the word 'a' that had been obscured by transmission static. Armstrong issued a statement to the effect that he found Ford's analysis 'persuasive'. However, subsequent research released in June 2009 supported the original interpretation - 'one small step for man'.