'Buzz' on the Mo...American astronaut Edwin 'Buzz' Aldrin on the surface of the moon next to the American flag during the NASA Apollo 11 mission. Prints from Aldrin's spaceboots mark the lunar terrain. Aldrin was the second man to walk on the moon, after Neil Armstrong. (Photo by Hulton Archive/Getty Images)
Mission to the M...Neil Armstrong leads Edwin 'Buzz' Aldrin and Michael Collins out of the space centre on the Apollo 11 space mission to the moon. (Photo by Keystone/Getty Images)
Astronaut Edwin ...In this July 20, 1969 file photo from NASA, Astronaut Edwin E. Aldrin Jr., lunar module pilot, is photographed walking near the lunar module during the Apollo 11 extravehicular activity. (AP Photo, NASA ,file)
U.S. FlagIn this July 20, 1969 file photo, Apollo 11 astronauts Neil Armstrong and Edwin E. "Buzz" Aldrin, the first men to land on the moon, plant the U.S. flag on the lunar surface. The National Aeronautics and Space Administration, which opened its doors on Oct. 1, 1958, is struggling with its identity and its future. Its angst is connected to the vehicle that NASA has been married to for more than half its lifetime and is seeking to dump the space shuttle. (AP Photo/NASA, File) ** zu unserem KORR **
Apollo 11 Lift-O...Apollo 11 Astronauts Neil A. Armstrong, Michael Collins and Edwin E. Aldrin Jr., are riding in this spacecraft as it lifts off the pad at Cape Kennedy, Fl., July 17, 1969. (AP Photo/NASA)
Edwin AldrinAstronaut Edwin Aldrin walks by the footpad of the Apollo 11 Lunar Module, July 1969. (AP-Photo/HO-NASA)
Earth View from ...Most of Africa and portions of Europe and Asia can be seen in this spectacular photograph taken from the Apollo 11 spacecraft during its translunar coast toward the moon, during the month of July, 1969. Apollo 11 was already about 98.000 nautical miles from earth when this picture was made. (AP-Photo/NASA HO)
The Apollo 11 Lu...The Apollo 11 Lunar Module 'Eagle' begins its ascent to rendezvous with the Command/Service Module 'Columbia' after its successful lunar landing, 21st July 1969. Picture taken from the Columbia. (Photo by Space Frontiers/Getty Images)
Queen Elizabeth ...Queen Elizabeth II with the Apollo 11 astronauts at Buckingham Palace, 1970. Left to right: Michael Collins, Neil Armstrong and Edwin 'Buzz' Aldrin. (Photo by Hulton Archive/Getty Images)
The Apollo 11 Cr...From left to right, Neil Armstrong, Michael Collins and Edwin 'Buzz' Aldrin Jnr, the crew of the historic Apollo 11 moon landing mission are subjected to a period of quarantine upon their return to earth. Through the window of their Mobile Quarantine Facility, they hold a conversation with President Richard Nixon (1913 - 1994). (Photo by MPI/Getty Images)
The Mission Oper...The Mission Operations Control Room in the Mission Control Center, Building 30 of NASA's Manned Spacecraft Center in Houston, Texas. The flight controllers are celebrating the successful return of the Apollo 11 lunar landing crew. (Photo by NASA/Space Frontiers/Getty Images)
Celebrations of ...Celebrations in the Manned Spacecraft Centre in Houston, Texas, upon the successful return of the Apollo 11 lunar landing crew. From right to left: MSC Director Dr Robert Gilruth, Manager of the Apollo Spacecraft Program George Low, MSC Director of Flight Operations Dr Christopher Kraft Jr, and Lt Gen Samuel Phillips and Dr George Mueller of NASA. (Photo by NASA/Space Frontiers/Getty Images)
Apollo 11 CrewFrom left to right, Neil Armstrong, Michael Collins and Edwin 'Buzz' Aldrin Jnr, the crew of the historic Apollo 11 moon landing mission are subjected to a period of quarantine upon their return to earth. (Photo by MPI/Getty Images)
Footprint on the...A footprint left on the surface of the moon by one of the Apollo 11 astronauts during their historic lunar EVA, 20th July 1969. (Photo by Space Frontiers/Getty Images)
Edwin E. Aldrin ...Lunar Module pilot Edwin E. Aldrin Jr on board the Lunar Module during the Apollo 11 lunar landing mission, 20th July 1969. (Photo by Neil Armstrong/Space Frontiers/Getty Images)
The Apollo Comma...The Apollo Command/Service Module over the moon's surface during the Apollo 11 mission, 20th July 1969. This is a composite image comprised of two separate shots. (Photo by Space Frontiers/Hulton Archive/Getty Images)
Neil ArmstrongNeil Armstrong, Commander of the space ship Apollo 11, speaking to a technician during a suiting at the Kennedy Space Center, Cape Canaveral, Florida, shortly before he set off for the Moon with fellow astronauts Michael Collins and Edwin 'Buzz' Aldrin. (Photo by Central Press/Getty Images)
Group PhotoGroup publicity portrait of Apollo 11 astronauts Neil Armstrong, Michael Collins, and Edwin 'Buzz' Aldrin wearing spacesuits. (Photo by Hulton Archive/Getty Images)
Edwin E AldrinAmerican astronaut Edwin E Aldrin on the Apollo 11 lunar landing mission, during which he became the second man to set foot on the moon. (Photo by NASA/Space Frontiers/Getty Images)
Neil Armstrong a...Apollo 17 astronaut Gene Cernan, right, raises the arm of Apollo 11 astronaut Neil Armstrong at a party Saturday, July 16, 1999 commemorating the 30th anniversary of the first moon landing. Armstrong was the first man on the moon and Cernan was the last. (AP Photo/George Shelton, NASA)