Question: Which American engineer and former astronaut travelled to the moon alongside Neil Armstrong, Michael Collins, and Edwin E. Aldrin, Jr. as a member of Apollo 11?

Context articles: NASA's Story
Michael Collins (astronaut)
Buzz Aldrin
Apollo 11
First Man: The Life of Neil A. Armstrong
The Astronaut Monument
First on the Moon (1970 book)
Armstrong (crater)
Return to Earth (film)
Tranquility Base

NASA's Story is a documentary series by Dangerous Films for the BBC to commemorate 50 years since the formation of NASA.
 The series looks at NASA's early history, the triumphs and disasters, notably the Apollo 1 fire, through to the manned Moon missions and the Space Shuttle era.
 The show includes various interviews with astronauts and NASA personnel such as Chris Kraft, Jon Clark, Leroy Cain, Scott Carpenter, Neil Armstrong and Buzz Aldrin, both crew members of Apollo 11.
Michael Collins (born October 31, 1930) (Major General, USAF, Ret.)
, is an American former astronaut and test pilot.
 Selected as part of the third group of fourteen astronauts in 1963, he flew into space twice.
 His first spaceflight was on Gemini 10, in which he and Command Pilot John Young performed two rendezvous with different spacecraft and Collins undertook two extra-vehicular activities (EVAs).
 His second spaceflight was as the Command Module Pilot for Apollo 11.
 While he stayed in orbit around the Moon, Neil Armstrong and Buzz Aldrin left in the Lunar Module to make the first manned landing on its surface.
 He is one of 24 people to have flown to the Moon.
Buzz Aldrin (born Edwin Eugene Aldrin Jr.; January 20, 1930) is an American engineer and former astronaut.
 As the Lunar Module Pilot on Apollo 11, he was one of the first two humans to land on the Moon, and the second person to walk on it.
 He set foot on the Moon at 03:15:16 on July 21, 1969 (UTC), following mission commander Neil Armstrong.
 He is a former U.S. Air Force officer with the Command Pilot rating.
 He also went into orbit on the Gemini 12 mission, finally achieving the goals for EVA (space-walk work) that paved the way to the Moon and success for the Gemini program; he spent over five hours on EVA on that mission.
Apollo 11 was the spaceflight that landed the first two humans on the Moon.
 Mission commander Neil Armstrong and pilot Buzz Aldrin, both American, landed the lunar module "Eagle" on July 20, 1969, at 20:18 UTC.
 Armstrong became the first to step onto the lunar surface six hours after landing on July 21 at 02:56:15 UTC; Aldrin joined him about 20 minutes later.
 They spent about two and a quarter hours together outside the spacecraft, and collected 47.5 lb of lunar material to bring back to Earth.
 Michael Collins piloted the command module "Columbia" alone in lunar orbit while they were on the Moon's surface.
 Armstrong and Aldrin spent just under a day on the lunar surface before rejoining "Columbia" in lunar orbit.
First Man: The Life of Neil A. Armstrong is the official biography of Neil Armstrong, the astronaut who became the first man to walk on the Moon on July 20, 1969.
 Written by James R. Hansen, it was published in 2005 by Simon & Schuster.
 The book describes Armstrong's involvement in the United States space program, culminating with the fateful Apollo 11 mission, while also detailing his personal life and upbringing.
The Astronaut Monument is a monument about the training of Apollo astronauts in northern Iceland during the 1960s, located outside The Exploration Museum in Húsavík.
 The monument contains the names of 32 Apollo astronauts that were sent to Iceland for training in geology for manned lunar missions, and has two steel globes on top of two basalt columns, representing the Earth and the Moon.
 The monument was unveiled on July 15, 2015, by the grandchildren of Apollo 11 astronaut Neil Armstrong.
First on the Moon: A Voyage with Neil Armstrong, Michael Collins and Edwin E. Aldrin, Jr. (ISBN  ) is a book by the crew of the Apollo 11 Moon landing (Neil Armstrong, Michael Collins, Buzz Aldrin) in collaboration with Gene Farmer and Dora Jane Hamblin, first published in 1970.
 It describes the events leading up to and during the Apollo 11 mission, the first manned landing on the Moon.
 It was first published in June 1970 by Little, Brown and Company.
Armstrong is a small lunar impact crater located in the southern part of the Mare Tranquillitatis.
 It lies about 50 kilometers to the northeast of the Apollo 11 landing site.
 Named after Neil Armstrong, the crater is the easternmost of the row of three craters named in honor of the Apollo 11 crew members.
 To the north is the Ranger 8 impact site.
Return to Earth is a 1976 American biopic TV movie that originally aired on May 14, 1976 on ABC.
 The film stars Cliff Robertson as astronaut Buzz Aldrin and Shirley Knight as Joan Aldrin.
 Based upon Aldrin's 1973 book of the same name, the film dramatizes the emotional difficulties of Aldrin's life following his trip to the moon on Apollo 11.
 The film was directed by Jud Taylor, and Aldrin served as a consultant.
Tranquility Base (Latin: Statio Tranquillitatis) is the site on the Moon where, in 1969, humans landed and walked on another celestial body for the first time.
 On July 20, 1969, Apollo 11 crewmembers Neil Armstrong and Buzz Aldrin landed their Apollo Lunar Module "Eagle" at approximately 20:17:40 UTC.
 Six hours later, the two astronauts exited the spacecraft and spent 2 hours 31 minutes on the lunar surface, examining and photographing it, setting up some scientific experiment packages, and collecting 47.5 lb of dirt and rock samples for return to Earth.
 They lifted off the surface on July 21 at 17:54 UTC.
 Tranquility Base has remained unvisited since then.