Al-Bert,
Lang's credentials are very impressive and he should know what he is talking about.
That being said....without knowing far more about him it is impossible to evaluate his position on issues.
I would suggest our involvement in the areas he was responsible for reporting upon has not been what could be described as a stellar success has it?
I have said in the past some huge mistakes were made.....using a single Source to base a plan of action, failing to field sufficient forces after the invasion, and then dis-banding the Iraqi Military, Police, and Government.
That was a genuine recipe for failure.....copied from WWII and the treatment of the Germans. Even Patton saw the folly of that back then.