Neil Armstrong has died at the age of 82.
Modest and quiet, the self-described "nerdy engineer" became a global hero with "one small step for man, one giant leap for mankind" on July 20, 1969.
That one small step was onto the moon, the first time such a thing had ever been done and marking the pinnacle of 20th Century space explorations.
His first words after setting foot on the surface will forever be etched in history books and in the memories of those who heard them in a live broadcast.
Armstrong and Edwin "Buzz" Aldrin spent nearly three hours walking on the lunar surface, collecting samples, conducting experiments and taking photos.
"The sights were simply magnificent, beyond any visual experience that I had ever been exposed to," Armstrong said in an interview years later.
In all, 12 American astronauts walked on the moon between 1969 and 1972, but none more famously than the Ohio native on Apollo 11.
Armstrong died following complications resulting from cardiovascular procedures, a statement from his family said. It didn't say where or when.