Neil Armstrong died Saturday following complications resulting from cardiovascular procedures according to a statement from his family.
Armstrong commanded the Apollo 11 spacecraft that landed on the moon July 20, 1969, capping the most daring of the 20th century's scientific expeditions. His first words after setting foot on the surface are etched in history books and in the memories of those who heard them in a live broadcast.
Photos of Neil Armstrong
"That's one small step for man, one giant leap for mankind," Armstrong said.
An estimated 600 million people -- a fifth of the world's population -- watched and listened to the moon landing, the largest audience for any single event in history.
Like the day John F. Kennedy was shot, or the day the Twin Towers were brought down, everyone remembers where they were and what they were doing when the events occurred.
I was away from home on an audit trip that Sunday night in 1969 and had checked into my hotel room just in time to watch the moon landing.