Defense: Eyes Toward the Sky

To the senses of human groundlings, a missile traveling at 16.000 m.p.h., a bomber flying at 65,000 ft., or an armed satellite spinning 200 miles high is clear out of this world. Yet each is now, or could soon become, a potential carrier of death for the 200 million inhabitants of the U.S. and Canada. Someone must see such hostile flights—and in good time.

Developing such omnivision is the job of the North American Air Defense Command (NORAD), headquartered in the shadow of Pike's Peak at Colorado Springs. NORAD also must react defensively to...

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