Basically I was saying that in general, we're supposed to leave law enforcement up to the police, and defense up to the military. Keyword: supposed to. Of course, both military and law enforcement have stepped outside of their constitutional bounds.
On the subject Obama is discussing, if we're going to be battling the Taliban in where ever, that should be done exclusively by the US and NATO troops. Private military contractors are part of for profit corporations, and should have no place in combat related to the foreign policy of the United States. No one else should be able to participate in that violence, unless some militia really feels like paying their own way to go over there.