United States Government Accountability Office, Rebuilding Iraq — Actions Still Needed to Improve the Use of Private Security Providers, statement of William Solis, Director, Defense Capabilities and Management, June 2006. ###>Unites States Governement Accountability Office, Rebuilding Iraq - Actions Still Needed to Improve the Use of Private Security Providers. Statement of William Solis, Director Defense Capabilities and Management (June 2006) 2.