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“Give the command,” Jinn said

In a control rooh above, someone pressed a button and sent out a coded command

The hter pattern and thenthrough the water

“What’s happening?” Mustafa asked

“The daether and held in place by its great weight, but not completely impervious”

As he spoke, the silver sand adhered to the edge of the dam in two separate places: one spot near the top of the da wall After a ress of the tiny machines became noticeable in the cross section of the dam

“Remarkable,” Alharma said, “the speed hich they penetrate”

“The actual dam is much thicker of course,” Jinn pointed out “But the effect will be the saer A matter of hours, I should think”

Within ers of the horde had reached the central core of the da continued until a pinprick had been bored through to the other side

In another regate and broken through A trickle of water began, quickly accelerating Soon the weight of the water behind the daap

“This effect will be heightened in the real event,” Jinn said “The weight of the water behind Aswan numbers in the trillions of tons”

Even in the scale ed Soon the gap o inches in diameter and then four Mo the h side of the tank flowed through the gap, pouring over the far side like a waterfall But it was the lower tunnel through the da

As the water surged over the top, it reached a point of equilibriu doard far less rapidly where the waterproof clay core resisted the erosion

“The da,” Mustafa pointed out

“Watch the lower tunnel,” Jinn insisted