CINCINNATI -- Neil Armstrong was a quiet, self-described nerdy engineer who became a global hero when as a steely-nerved pilot he made "one giant leap for mankind" with a small step onto the moon. The modest man, who had people on Earth entranced and awed from almost a quarter-million miles away, died Saturday. He was 82.Armstrong died following complications resulting from cardiovascular procedures, his family said in a statement. It didn't say where he died; he had lived in suburban Cincinnati.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 the memories of those who heard them in a live broadcast.