CSPAN Washington This Week September 21, 2014
Let me explain. When the two forces are separate, when isil is at some geographic separation from the Iraqi Security forces, it is not very difficult at all to discriminate between the targets. Isnt our problem when they are not out in open space and we have to distinguish between civilian targets and military targets that our people are very effective at that . Absolutely. If we get into a circumstance where the forces are very intermingled then the target discrimination becomes more difficult....
Source: archive.org