Navy astronaut dies by falling to the ground at Vandenberg AFB, California, when a steel cable fails during an emergency-evacuation drill in preparation for a space-shuttle mission to repair a satellite. Harm and Meg investigate the death of the Naval aviator. The evidence first casts suspicion on an ambitious fellow astronaut, but a second casualty turns attention toward the possibility of the involvement of an agent of another nation. Harm and Meg find a disgruntled civilian worker whom a foreign agent has recruited. The mission goes on schedule, then, acting on a hunch, Harm and Meg enable the colonel in charge to avert the destruction of the satellite in need of repair. Harm twice flies again.

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