The Pentagon is looking at the relationship between its prime contractors and their subcontractors. That relationship has generated some controversy, especially in the area of private military security companies. Ann Hagedorn is author of The Invisible Soldiers: How American Outsourced Our Security. Her book focuses on the pros and cons of those companies and how the government buys their services. On In Depth with Francis Rose, she shared the story of Kadhim Alkanani.