In this 2011 photo, U.S. Army Staff Sgt. Marc Krugh, left, looks on as a comrade peers through the scope on his weapon during a patrol 30 miles south of Baghdad. Columnist David Brooks says American leaders should be more skeptical about the ability to make transformational change in other countries.
In this 2011 photo, U.S. Army Staff Sgt. Marc Krugh, left, looks on as a comrade peers through the scope on his weapon during a patrol 30 miles south of Baghdad. Columnist David Brooks says American leaders should be more skeptical about the ability to make transformational change in other countries. Maya Alleruzzo Associated Press
In this 2011 photo, U.S. Army Staff Sgt. Marc Krugh, left, looks on as a comrade peers through the scope on his weapon during a patrol 30 miles south of Baghdad. Columnist David Brooks says American leaders should be more skeptical about the ability to make transformational change in other countries. Maya Alleruzzo Associated Press

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David Brooks: What U.S. should take away from Iraq experience

May 19, 2015 11:00 AM

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