In May 2011 Congress reported that private military and security contractors outnumbered U.S troops by a ratio of 10 to one. These contractors provide everything from intelligence analysis to diplomatic security, and they even replace American forces after they withdraw from combat zones. Author and journalist Ann Hagedorn deconstructs the U.S. military’s increasing reliance on the private sector and problems with that relationship in "The Invisible Soldiers: How America Outsourced Our Security."