Neil Armstrong became the first man to walk on the moon on July 20, 1969, a moment he marked with the iconic phrase, "One small step for man, one giant leap for mankind." But in a new BBC documentary, Armstrong's brother, Dean, contradicts the late astronaut's insistence that he came up with those famous words on the spot.
In "Neil Armstrong: First Man on the Moon," Dean Armstrong says that he saw Neil's speech months before the Apollo launch during a family game of Risk.