The first man to set foot on the Moon has died, at the age of 82.
Astronaut Neil Armstrong began his career with the US space agency in the 1950s after serving as a Navy pilot.
His was first hired as engineer but later became a test pilot.
He pioneered several high speed aircraft, and tested rockets, helicopters and gliders.
Armstrong became an astronaut in 1962 as command pilot for the Gemini 8 mission.
He performed the first successful docking of two vehicles in space, and went on to command Apollo 11, the first manned mission to the Moon.
Neil Armstrong stayed out of the limelight in his later years, and became an administrator for NASA.
He served on the board which investigated the Challenger accident in 1986.
Armstrong had undergone surgery earlier this month.
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