The lead scientist at the Los Alamos facility, upon detonation of our first nuclear bomb, said:
"I am become death, the destroyer of worlds."
I've posted about and studied Tsar Bomba and seen the videos of it.
I've seen videos of dozens of nuclear explosions, and many of them have an unworldly, really creepy appearance.
I didn't know that the Soviets had actually included wraps of lead, replacing wraps of uranium, to limit the yield of the bomb. There were a few explosions at the edge of the atmosphere during the nuclear weapons testing years, but they were stopped because of unexpected consequences. In one case, radio frequency effected equipment was destroyed on a far greater range and scale than would have ever been expected.
Just the capability of the mind of man to devise such a weapon is a concern to me, that someone could and would think those thoughts. Kind of like various torture methods devised over time, the description of the methodology in itself is horrifying, much less making use of them.
Revelation 6:14...
"The heavens receded like a scroll being rolled up, and every mountain and island was removed from its place."
That is what I think of when I see the capability of some nuclear weapons.
Look at the atmosphere around the mushroom cloud and tell me if that doesn't look like a scroll being rolled up: