It will start with a flash of light brighter than any words of any human language can describe. When the bomb hits, its thermal radiation, released in just 300 hundred millionths of a second, will heat up the air over K street to about 18 million degrees Fahrenheit. It will be so bright that it will bleach out the photochemicals in the retina of the eyes of anyone looking at it, causing people as far away as Bethesda and Andrews Air Force Base to go instantly, if temporarily blind.

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