Question: How many people were there in the Apollo 11 support crew?
About the article "Apollo 11", section "Support crew".

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Eugene Cernan, Ronald Evans, and former X-15 pilot Joe Engle were assigned to the backup crew of Apollo 14.
Engle flew sixteen X-15 flights, three of which exceeded the border of space.
Following the rotation pattern that a backup crew would fly as the prime crew three missions later, Cernan, Evans, and Engle would have flown Apollo 17.
Harrison Schmitt served on the backup crew of Apollo 15 and, following the crew rotation cycle, was slated to fly as Lunar Module Pilot on Apollo 18.
However, Apollo 18 was cancelled in September 1970.
Following this decision, the scientific community pressured NASA to assign a geologist to an Apollo landing, as opposed to a pilot trained in geology.
In light of this pressure, Harrison Schmitt, a professional geologist, was assigned the Lunar Module Pilot position on Apollo 17.
Subsequent to the decision to assign Schmitt to Apollo 17, there remained the question of which crew (the full backup crew of Apollo 15, Dick Gordon, Vance Brand, and Schmitt, or the backup crew of Apollo 14) would become prime crew of the mission.
NASA Director of Flight Crew Operations Deke Slayton ultimately assigned the backup crew of Apollo 14 (Cernan and Evans), along with Schmitt, to the prime crew of Apollo 17. 
Television Serrana has been a growing success, but there were difficulties in the beginning.
One of the problems of TVS was the lack of experience many of the crew members had.
Most had to take training sessions on how to work media products and running programs within the community.
As mentioned before, the trainees had to learn how to do video letters and how to transfer and copy video-cassettes to and from Beta VHS.
The greatest of constraints for the project was gaining the trust and confidence needed by the local communities.
Many of the villagers were skeptical of the programs intentions, which created difficulties to gain the support from locals.
The people of Sierra Maestra felt the newcomers were intruding onto their land, interrupting their daily lives and thought the intentions of the crew were to give the locals a bad image.
The crew had to show the people that they came with positive objectives and wanted to help the communities. 
Mattingly had originally been assigned to the prime crew of Apollo 13, but was exposed to the measles through Duke, at that time on the back-up crew for Apollo 13, who had caught it from one of his children.
He never contracted the illness, but was nevertheless removed from the crew and replaced by his backup, Jack Swigert, three days before the launch.
Young, a captain in the United States Navy, had flown on three spaceflights prior to Apollo 16: Gemini 3, Gemini 10 and Apollo 10, which orbited the Moon.
One of 19 astronauts selected by NASA in April 1966, Duke had never flown in space before Apollo 16.
He served on the support crew of Apollo 10 and was a Capsule Communicator (CAPCOM) for Apollo 11. 
The Apollo insurance covers are autographed postal covers signed by the astronaut crews prior to their mission.
The Insurance Covers began with Apollo 11 and ended with Apollo 16.
The ability of astronauts to obtain much life insurance was limited because of their risky Moon missions, so they signed hundreds of postal covers before they left, with the understanding that they would become highly valuable in the event of their death.
The crew would designate a trusted ally with the covers who wold then have them canceled at the Kennedy Space Center (KSC) post office on the day of launch and/or on the day of the lunar landing.
Apollo 11 Insurance Covers normally fetch the highest prices because of it being the first lunar landing.
Apollo 15 Insurance Covers are the most common.
The are three varieties of the Apollo 11 covers, four of Apollo 12, two of Apollo 13, two of Apollo 14, one of Apollo 15 and one of Apollo 16.
Some astronauts also left behind single signed covers for their families as well.
The were two producers of the mission covers were "The Manned Spacecraft Center Stamp Club" in Houston, Texas (the MSCSC Covers) and by a friend of the astronauts, "Al Bishop" (The Bishop Covers).
Especially in the case of the MSCSC Covers, there are many of the exact covers that the stamp collectors also obtained through the club.
These were also crew signed, but many after the mission, which makes them not an Insurance Cover.
The essence of a true Insurance Cover is the fact that it was signed while in quarantine prior to launch and that it was one of those that were left behind for the crew families in the event of disaster.
In order to be certain that a cover is a genuine Insurance Cover, it must originate from one of the crew members of their families.
Ideally, the reverse of the cover should be certified on its reverse side by one of the crew.
Although flown artifacts from the Apollo missions are normally the most desirable objects for collectors, Insurance Covers have become highly popular because they truly display all that a collector would want from a mission; a beautiful design which normally included the mission emblem, a postal cancellation of the day of launch, authenticate vintage signatures of the crew prior to the launch and a certification attesting to its authenticity.  
During Johnson's administration, NASA conducted the Gemini manned space program, developed the Saturn V rocket and its launch facility, and prepared to make the first manned Apollo program flights.
On January 27, 1967, the nation was stunned when the entire crew of Apollo 1 was killed in a cabin fire during a spacecraft test on the launch pad, stopping Apollo in its tracks.
Rather than appointing another Warren-style commission, Johnson accepted Administrator James E. Webb's request for NASA to do its own investigation, holding itself accountable to Congress and the President.
Johnson maintained his staunch support of Apollo through Congressional and press controversy, and the program recovered.
The first two manned missions, Apollo 7 and the first manned flight to the Moon, Apollo 8, were completed by the end of Johnson's term.
He congratulated the Apollo 8 crew, saying, "You've taken ... all of us, all over the world, into a new era."
On July 16, 1969, Johnson attended the launch of the first Moon landing mission Apollo 11, becoming the first former or incumbent US president to witness a rocket launch.