“It was terribly, terribly frustrating; coming up over that ridge that we were going up, and thinking, finally, that was it; and it wasn’t – suddenly recognizing that, really, you just don’t know where you are.” Ed Mitchell
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.