Apollo 11 astronaut Michael Collins reflects on the historic mission which saw Neil Armstrong and Buzz Aldrin become the first humans to walk on the moon. Then, Charles Fishman tells Christiane Amanpour about the hundreds of thousands of Americans that made the Apollo 11 mission possible, which he details in his book "One Giant Leap". Finally, author and journalist Kati Marton tells our Walter Isaacson about her journey from communist Hungary to America, and the legacy of her late husband, the legendary diplomat Richard Holbrooke.

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