  Although some maximal versions of deontological pacifism will claim that it is wrong even to kill combatants in war, other versions will argue that war is wrong primarily because of the risk to noncombatants.  A cherished principle of the just war tradition is the idea of noncombatant immunity. This idea holds that those not actually engaged in the fighting should not be put at risk and should not be deliberately targeted. This idea is often connected to the idea that the innocent should not be killed. Noncombatants are presumed to be innocent and thus immune from being killed. There is an open question as to whether all noncombatants are really innocent.  But the just war tradition stipulates that noncombatants should be immune from intentional harm.  A version of pacifism can thus be derived from this principle of the just war tradition by arguing against wars that do in fact end up killing innocent noncombatants. Just war pacifists will argue that this is especially true given the nature of modern warfare, which includes the use of mechanized weapons, aerial bombardment, and weapons of mass destruction. Such weaponry does not adequately discriminate between combatants and noncombatants. Thus modern war cannot be just, according to the pacifist interpretation of the just war tradition.