Perhaps This Is Why Rumsfeld Insists the US Doesn't Need More Troops In Iraq?

Global Guerillas:

PSCAI (Private Security Company Association of Iraq) estimates that there are 35,000 private military contractors (those who are using lethal force and employed by global corporations) in Iraq. Note that the vast bulk of these contractors are operating outside the realm of any counter-insurgency strategy (and by their actions, defined by their missions, typically undermine it).