A small plutonium source was used to power the Radioisotope Thermoelectric Generator (RTG) that would provide electric power for the ALSEP experiments. Ed Mitchell performed the delicate maneuver of inserting the fuel capsule into the RTG.
“Al is on the surface. And it’s been a long way, but we’re here.” Alan Shepard
Suddenly the caution lights went out and the radar signals began to transmit. Within seconds the astronauts could see that its data was good. Seconds later in mission control, a jubilant Will Presley shouted, “Flight, we got radar lockup!”
While checking the lander’s guidance software, during a final practice run for the landing, engineers in mission control detected that the computer was receiving an errant signal from the abort pushbutton.
The first extended use of the Service Propulsion System engine on the Command and Service module was for the Lunar Orbit Insertion (LOI) burn.
Mitchell kept his plan a secret from NASA, knowing that the agency would be completely unreceptive to the idea. He said nothing about it to his crewmates. The test subjects had also agreed to keep quiet.
“The approaching dusk and the damp mistiness left by the now-departed rainstorm only enhanced the spectacular sight and the sound of the launch. Tentacles of flame erupted on either side of the bottom of the Saturn V, which seemed to sit in its own cauldron of fire momentarily before breaking free of its shackles, as four hold-down arms at the base of the launch pad and five access arms along the outside of the booster swung away.” (Smoke Jumper, Moon Pilot by Willie Moseley)
On November 9, 1970, the Apollo 14/Saturn V assembly, as tall as a 36-story building, rolled out of the Vehicle Assembly Building on the proportionally huge crawler transporter.