It's not beyond the realm of possibility that they could have hustled the Iron Dome 'prototypes' to A-stan so quickly but that would have required being pro-active, which is something that there's been precious little evidence of since the start of this fiasco.
Of course it could be the same as the case of the SpecWarriors who defied orders and went outside the wire in Kabul to round up all the Afghanis who had served them as guides and interpreters. Maybe somebody in the Air Defense command structure with both brains and balls (and probably at Ft Sill) saw this coming and put the wheels in motion to move those Iron Dome systems to A-stan simply because it was the right thing to do and damn the consequences.
There are other versions of the same story on the 'web offering more detail from this anonymous source, stating that the US military has defenses against rocket and mortar attacks. Except I think that their source is conflating a counterbattery fire system with a system that can literally shoot rockets and mortars out of the sky. Or maybe the reporter fails to understand the distinction.
As to the former, the US has had systems in the field for decades that use radar to measure the trajectory of incoming artillery and use that data to back-track to the point of firing. Then it relays those grid coordinates to an artillery battery and the cannon-cockers execute a fire mission against that target.
But those counterbattery fire systems don't do anything approaching shooting an arty round in flight out of the sky. And until this story surfaced, there was no indication that the US had anything that was both designed for that purpose and had proved itself effective.
found the answer: C-rams