Earlier today, the Iraqi government announced a ban on Blackwater Worldwide, a contracting company that provides protection to many Americans in Iraq, including high-ranking diplomats. (As you may know, Blackwater has had a checkered history in the country.)
Noah Shachtman, writing on WIRED's Danger Room, says that, the ban might not do much:
Sure, Blackwater as a corporate entity probably won't be roaming the streets of Baghdad or Mosul for much longer. But the individual mercenaries who've been working for years in Iraq, serving as a Praetorian Guard for the State Department's diplomats -- those guys likely will be able to stay.