In “Private Warriors,” FRONTLINE (2005), correspondent Martin Smith travels throughout Kuwait and Iraq

to give viewers an unprecedented behind-the-scenes look at companies like Kellogg, Brown & Root, a Halliburton subsidiary, and its civilian army.

“Private Warriors” also explores a very different kind of contractor

– the private world of security teams that work for firms like Blackwater, Aegis, and Erinys.

They provide armed protection for U.S. government officials, government offices, military installations and even military commanders.