These simulators were shown to the public during the TV coverage of the Apollo 11 mission. The networks had a lot of dead air to fill during the marathon 24 hour a day coverage, and there was a lot of "human interest" in showing footage of the astronauts training.

They ran clips of the astronauts using the Langley simulators dozens of times during the mission. It was no secret to anyone who watched Apollo 11 coverage, including me.

__________________
"Time travel gives me a headache." - Capt. Kathryn Janeway