Hell on Earth. Washington, DC,  Possibly Sometime in the Near Future.

A 1-megaton thermonuclear weapon detonation begins with a flash of light and heat so tremendous it is impossible for the human mind to comprehend. One hundred and eighty million degrees Fahrenheit is four or five times hotter than the temperature at the center of the sun.

In the first fraction of a millisecond after the bomb strikes the Pentagon, there is light. Soft X-ray light with a very short wavelength. The light superheats the surrounding air to millions of degrees, creating a massive fire-ball that expands at millions of miles per hour. Within seconds, this fireball increases to a diameter of a little more than a mile, its light and heat so intense that concrete surfaces explode, metal objects melt or evaporate, stone shatters, humans instantaneously convert into combusting carbon. The five-story, five-sided structure and everything inside its 6.5 million square feet of office space explodes into superheated dust; all 27,000 Pentagon employees perishing instantly.

https://nypost.com/2024/03/23/us-news/what-would-happen-to-washington-dc-if-attacked-by-a-nuclear-bomb/