What makes anyone think that more troops would make much of an improvement in Iraq?  In my opinion, no amount of soldiers can stop suicide bombers looking to massacre pretty much anyone outside their religion.You guard the pipelines, they bomb the police station.  You guard the police station they bomb the hospital.  You guard the hospital they bomb the market.  You guard the market they bomb the mosques.  You guard the mosques they bomb the bus stations.  You guard the bus stations they bomb cafés.

It seems to me that unless you’re talking about instituting a police state, no amount of troops will be effective against the sort of violence inherent to this new worldwide trend of Islamic murder and thuggery.