The Americans watched from space as the earth erupted in flashes of incredible brilliance. Their probes told them all they had to know. The earth was buried under a blanket of radioactivity. No life remained.
Except for them—and their Russian counterparts.
Together the American and 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 ensure the survival of the human race.