Rise early and strike them first; destroying their command and control structire; and use EMPs to knock out their electrical power. It would go a long way to prevent further carnage. Of course the very best thing, if it were possible would be to terminate Ahminadjab and the mullahs, leaving the rest of Persia largely unscathed.No options are risk free, but it increasingly appears that removing Iran's nuclear threat sooner rather than later is the best one.
And we should take great care to prevent the war from widening to engulf the entire Middle East.