The Americans watched from space as the earth erupted in flashes of incredible brilliance. their probes thold them all they had to know. the earth was buried under a blanket of radioactivity. No life remained. Except for them--and their Russian counter-parts. Together the american & Russian space stations had enough resources to build a colony on the moon. But could they bear life imprisoned in a tiny, man-made pocket of air? There was no alternative. Or was there? A Far more perilous course might, just might ensure the survival of the human race.