Washington: Fifty years ago on Saturday, American astronauts Neil Armstrong and Buzz Aldrin became the first humans in history to set foot on the Moon, an event watched on television by half a billion people.
Their lunar module, named "Eagle," touched down at 2018 GMT (4:18pm ET) on July 20, 1969.
A little over six hours later, at 0256 GMT, Armstrong placed his left foot on the lunar surface, declaring: "That's one small step for man, one giant leap for mankind."
NASA has been in overdrive for several weeks to mark the anniversary, with exhibits and events nationwide but most notably at the Kennedy Space Center in Cape Canaveral, Florida and the Johnson Space Center in Houston, Texas.
On Saturday, Vice President Mike Pence is due to deliver a speech from the Kennedy Space Center, from where Armstrong, Aldrin and Michael Collins, the third crew member took off.