Environment: Autopsy on Cannikin

In the aftermath of the explosion of a Spartan warhead a mile below the surface of Amchitka Island, the world's environmentalists waited anxiously for the postoperative reports on what was surely one of the greatest shocks man had ever inflicted on his supportive earth. There were no earthquakes, no tidal waves. To date, it has been a case of no news being good news.

The initial shock did cause numerous cliff falls and rock slides along Amchitka's shoreline. A flurry of barely noticeable tremors followed as the tormented earth adjusted itself around the 800-ft.-wide subterranean cavity created by the blast: 38 hours...

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