24) NASA launched the TETR-A satellite just months before the first lunar mission. The proclaimed purpose was to simulate transmissions coming from the moon so that the Houston ground crews (all those employees sitting behind computer screens at Mission Control) could "rehearse" the first moon landing. In other words, though NASA claimed that the satellite crashed shortly before the first lunar mission (a misinformation lie), its real purpose was to relay voice, fuel consumption, altitude, and telemetry data as if the transmissions were coming from an Apollo spacecraft as it neared the moon. Very few NASA employees knew the truth because they believed that the computer and television data they were receiving was the genuine article. Merely a hundred or so knew what was really going on; not tens of thousands as it might first appear.