At first we built an A bomb
To keep the free world free.
It terrified the Russians
Who rivalled A with B.

B bomb proved unstable,
Soon surpassed by C
Capable of carnage
Half as great as D.

Energy was E bomb,
Its fire as red as Mars
But F bomb made two fingers -
It rivalled minor stars.

G bomb raised the ante,
One blast would cleave the sky;
The Navy feared the H bomb
That left the oceans dry.

No-one built an I bomb
As I bomb seemed too vain
But J bombs proved prolific:
The world had gone insane.

K, derived of knowledge
Studying black-holes,
Separated mind and flesh,
Extinguishing our souls.

L bombs made all nations
Bow before the Lord
But M encouraged Mammon
To keep the people fooled!

So men developed N bombs -
Neutrinos make you glow
As passing through all atoms
They generated O.

P bombs, built like pulsars,
Simulate the bang
That brought about creation
And left it out to hang.

Qs imitated Quasars,
Blistering a foe
And R bombs retro-travelled time
To zero zero zero.

S bombs were theoretical
As were T and U;
We blew them from existence
With V and W.

X, designed to x-ray
Anywhere you hide,
Turned planets into shadow
On the negative of pride.

Then man looked all around him,
Regretting all the dead
But, sadly, Y exploded 
Detonating Z.