On April 20, 1969, millions of people around the world watched on television as Apollo 11 astronaut Neil Armstrong took his historic step into the pages of history.
A breathtaking achievement, the mission delivered on to President Kennedy's 1961 promise to land on American on the Moon by the end of that decade. With the American Flag flying proudly on the Sea of Tranquility, the U.S.
The Moon landing was a truly global event. An estimated 650 million people watching the Moon on TV, according to NASA.
APOLLO 11'S MICHAEL COLLINS REFLECTS ON HISTORIC MOON LANDING: 'WE WERE JUST REGULAR ASTRONAUTS'
"Tomorrow wants to represent 50 years from the time we planted a beautiful American flag on the moon," said President Donald Trump. The moon landing, he added, is "one of the great achievements ever."
"50 years ago history made three astronauts landed on the moon!" Tweeted vice president Mike Pence, who is chairman of the national space council.
50 YEARS AFTER APOLLO 11, NEIL ARMSTRONG'S SONS DESCRIBE THE DAY THEIR DAD WALKED ON THE MOON
Aldrin, however, voiced his disappointment over America's space progress since the days of Apollo 11.
50 years later, Armstrong's famous first steps on the lunar surface remain the iconic moment of the Apollo missions.
Approximately 234,000 miles away, his sons Mark and Rick were at home in Houston, watching on TV, as their father made history.  APOLLO 11 INSIDERS REMEMBER HISTORY'S MOST FAMOUS SPACE MISSION: 'WE HAD A JOB TO DO & WE DID IT'
Rick was 12 years old when his father stepped out of the Eagle lunar module and proclaimed "One small step for a man, one giant leap for mankind. "
" When told, no one in the room heard what the words were because they were all 'what did he say?' "Rick told Fox News, in a recent interview. "I heard it, and I said 'something about a small step,' but at the time, it's not clear what's going on, I always remember that."
Collins orbited the Moon in the Columbia Command Modules while Armstrong and Aldrin explored the lunar surface. "Being close to the Moon is wonderful, but looking at Earth, it's just that little thing, blue and white and very shiny," he told Fox News, in a recent interview.
APOLLO ASTRONAUT RECOUNTS MISSION CONTROL DURING MOON LANDING: 'IT WHAT TENSE, BECAUSE THIS WAS WHAT IT DOES, BECAUSE THIS WHAT THE REAL THING NOW '
After Armstrong and Aldrin, only 10 more men, all Americans, would walk on the Moon. The last NASA astronaut to set foot on the lunar surface was Apollo 17 Mission Commander Gene Cernan on Dec. 14, 1972.
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Be sure to catch the America's HQ Apollo 11 50th Anniversary Special on Fox News on Saturday, July 20 at 12 PM EDT.
Fox News' Chris Ciaccia contributed to this article.
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