What they said
"For those who may ask what they can do to honor Neil, we have a simple request. Honor his example of service, accomplishment and modesty, and the next time you walk outside on a clear night and see the moon smiling down at you, think of Neil Armstrong and give him a wink."
Neil Armstrong's family, announcing his death in a written statement.
"Neil was among the greatest of American heroes — not just of his time, but of all time. … When Neil stepped foot on the surface of the moon for the first time, he delivered a moment of human achievement that will never be forgotten."
President Barack Obama
"With courage unmeasured and unbounded love for his country, he walked where man had never walked before. The moon will miss its first son of earth."
Mitt Romney, Republican presidential candidate
"Neil Armstrong understood that we should reach beyond the stars. His 'one giant leap for mankind' was taken by a giant of a man."
U.S. Sen. Bill Nelson, D-Fla., who flew on space shuttle Columbia in 1986, just one month before the Challenger accident
"As long as there are history books, Neil Armstrong will be included in them, remembered for taking humankind's first small step on a world beyond our own."
Charles Bolden, NASA administrator
"He was the best, and I will miss him terribly."
Michael Collins, who flew to the moon with Neil Armstrong
"On behalf of the Aldrin family we extend our deepest condolences to Carol & the entire Armstrong family on Neil's passing. He will be missed."
Buzz Aldrin, second man to walk on the moon
"When I think of Neil, I think of someone who for our country was dedicated enough to dare greatly."
John Glenn, the first American to orbit Earth and Neil Armstrong's close friend