Must be within 8200m.
The US taxpayers take a few more billion dollars and piss it into the wind. Thanks LIBs/DIMs/RINOs...thanks a lot.
Unless they have a lot more sophisticated mortars now than during the Korean war, I would think the mortars are much closer to the green Zone.
Stats on our 4.2 Mortar which had a rifled barrel and a good range show:
Effective firing range 515 m (563.21 yds)
Maximum firing range 4,023 m (4,400 yds),