But clearly the fact that we've gone from zero Iraqi security forces on duty in May to up to 200,000 today is an enormous accomplishment, but it's not enough.

You know as well as I do that counterinsurgency is a very nuanced type of military operation.

But as we move from this period of what many Iraqis regard as perceived occupation, we need to move towards one of partnership.

Certainly our goal is to leave Iraq, but we can't leave Iraq with our forces until we know that the Iraqi security forces are capable and efficient enough to defend the sovereignty of the nation.

Well, the hardest thing to do, as we know from our own experience on 9/11 is protect everything all the time.

And so I think that if the person has the funds, the network, and the equipment to do this, and also the experience, which is the key factor, then they can be quite deadly.

Undoubtedly, there are members of the former regime that are cooperating in some fashion and then there are extremists that are within Iraq that are cooperating with them.