The PR from the detonation of this single weapon goes well beyond the relative paucity of the numbers killed.
Demoralization of the enemy was a big part of the objective, and there is plenty of evidence that a number of entities around the world sat up and took notice. The next one may land on THEM, and that is not a risk they should want to take.
And as far as the cost of the munitions expended, that is immaterial. The money was already spent in the original acquisition. Storage costs now stop.
- - - Storage costs now stop.
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Where exactly are these mothers stored ?