Neil Armstrong, the American astronaut, who has died aged 82, cemented a unique place in the history of mankind by becoming the first person to walk on the Moon; though his personal achievement was a product of the Cold War’s bitter technological and political rivalry, the successful completion of his mission proved a transcendent moment that captured the imagination of the entire planet. One Small Step pays tribute to the man - a reluctant hero; the mission - seeming impossible; the moon - the unknown. 'That’s one small step for man, one giant leap for mankind.'