Life After DOOMSDAY | Bruce Clayton

When a nuclear weapon is exploded, the incredible
amount of energy released instantaneously heats a large
volume of air to a temperature of tens of millions of
degrees. The white-hot air radiates heat intensely and
gives off so much light that a 1-megaton fireball looks
brighter than the sun even when viewed from a distance
of 50 miles. The flash in the sky from a relatively small
100-kiloton burst is visible from as much as 400 miles
away at night. (If the attack comes after dark, there
won’t be much question about which nearby cities have been hit.)

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