As a secondary source, I found an article about U.S. commanders' failures in Afghanistan. Which really help me to do my essay about that subject. The article mentions how unexpected numbers of commanders been blamed of failures in many incidents which caused the death or the injury of the troop in 2008 and 2009.
This article is written by the Washington Post, what made it more reliable source. It was written by Greg Jaffe, and his credentials is the U.S. military. This article is current enough because it was written on February 05, 2010.
Washington Post published this article, which is a well weekly known newspaper. The author described how military officials response to the reprimands been said about them, and how causalities are inevitable during war ( quoted in "This is a war where the other side is trying, too")