A nuclear explosion might eventually be Earth’s only way to protect itself from a dangerous asteroid. But preparing for that ...

But as he pulled away from the enormous roiling cloud ... nuclear reactions was the only way to get definitive data on just what had happened inside the multi-million-degree heart of an atomic ...

For the first time in history there was a nuclear explosion ... Two supplementary explosions occurred in the cloud shortly after the main explosion. The cloud contained several thousand tons ...