'nuke' is slang for 'nuclear'.
it is also a slang verb meaning: to heat in the microwave
for example: nuke the coffee
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these are pix that I took at Hiroshima.
The A-Bomb Dome was directly under the bomb, and remained standing.
All other buildings in the city were knocked down sideways by the blast wave.
The copper plates on the dome of the roof were melted, but the iron framework remained.
Even an iron spiral staircase on the left was only partially melted.