Certainly from the CSTC-A perspective, we use consultants to assist us both in Kabul with the headquarters and then the delivery of training. I did not get involved and didn't see any contractors involved with actual conduct of military operations. But because we were short, we hired a number of contractors to help us to great effect. They tended to be ex-military and tended to be on staff training. For example, in the introduction of NATO weapons and up-armoured Humvees, they brought a great skill set to help us do the training.
However, I was not involved in any sort of conduct of military operations with private security. We did not hire them for that task.