The U.S. military is dependent on contractors in modern warfare, and their are undertones of animosity between the State and D.O.D. over who should be taking more blame over Blackwater. Since 2004, State has paid Blackwater $833,673,316, compared with Defense Department contracts of $101,219,261.
http://www.washingtonpost.com/wp-dyn/content/article/2007/09/25/AR2007092502675_pf.html