NBC News:

Neil Armstrong, the first man to walk on the moon, died Saturday, weeks after heart surgery and days after his 82nd birthday.Armstrong commanded the Apollo 11 spacecraft that landed on the moon on July 20, 1969, and he radioed back to Earth the historic news of “one giant leap for mankind.” He spent nearly three hours walking on the moon with fellow astronaut Edwin “Buzz” Aldrin.

Sad day.