Petraeus interview

MSNBC
. His next area of emphasis:

Some of the facility protection security forces, particularly, those within the ministry of health and other key ministries, certainly have shown significant sectarian biases and they have to be dealt with as well. So, there's going to be effort required in this area.

This is going to be the tough part. You can police neighborhoods fairly easily with enough bodies, but dysfunction in the networks that horizontally support those neighborhoods is going to keep you at ground zero forever unless you can stabilize them.