"When The Atom Bomb Fell" by Karl and Harty (1945)
(excerpt: 1:03)
[title]
 
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Lyrics:

Oh it went up so loud it divided up the clouds
And the houses did vanish away
And a great ball of light filled the Japanese with fright
They must have thought it was their judgment day
Smoke and fire, it did flow, through the land of Tokyo
There was brimstone and dust everywhere
When it all cleared away there the cruel old Japs did lay
The answer to our fighting boys' prayer
Yes lord, the answer to our fighting boys' prayer

There was no athiest in a foxhole
An men who'd never prayed before
Lifted tired and bloodshot eyes to heaven
And begged the Lord to end that awful war
They told Him of their homes and loved ones
They told Him that they'd like to be there
I believe the bomb that struck Hiroshima
Was the answer to our fighting boys' prayer

78