WASHINGTON - Iraq's security forces will be unable to take control of the country in the next 18 months, and Baghdad's national police force is so rife with corruption it should be scrapped entirely, according to a new independent assessment. The study, led by retired Marine Corps Gen. James Jones, is a sweeping and detailed look at Iraq's security forces that will factor heavily into Congress' upcoming debate on the war. Republicans see success by the Iraqi forces as critical to bringing U.S. troops home, while an increasing number of Democrats say the U.S. should stop training and equipping such...