Terminal Compromise · Chapter 69T-Minus 110 Seconds and Counting

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Mission control specialists at the Cape and in Houston monitored every conceivable instrument on the Shuttle itself and on the ground equipment that made space flight possible.

A cavernous room full of technicians checked and double checked and triple checked fuel, temperature, guidance, computers sys- tems, backup systems, relays, switches, communications links, telemetry, gyros, the astronauts' physiology, life support systems, power supplies . . .everything had a remote control monitor.

"The liquid hydrogen replenish has been terminated, LSU pressuri- zation to flight level now under way. Vehicle is now isolated from ground loading equipment."