Astronaut Neil Armstrong, the first man ever to walk on the moon, has died at age 82.

Armstrong was commander of the Apollo 11 mission that made the first manned moon landing on July 20, 1969. He radioed back to Earth the historic news: "That's one small step for a man, one giant leap for mankind."

STORY: Neil Armstrong, first man on the moon, dies

He spent nearly three hours walking on the moon with fellow astronaut Edwin "Buzz" Aldrin, NBC reports.

Update 3:40 p.m. ET: The Associated Press reports that Armstrong's family says he died following complications resulting from cardiovascular procedures. It's not clear where he died.

Update at 3:29 p.m. ET: Armstrong, who lived in the Cincinnati area, recently had heart surgery, NBC reports. Surgeons bypassed four blockages in his coronary arteries. His wife had said his spirits were high and that doctors expected no problems with his recovery.