BAGHDAD, Iraq - The U.S. military launched a major combat operation with 1,000 Marines and Iraqi soldiers in northwestern Iraq on Friday, officials said. Operation Spear started in the pre-dawn hours in restive Anbar province. The soldiers will hunt for insurgents and foreign fighters. The province, which straddles the Syrian border, is where the military said it killed about 40 militants in airstrikes on June 11. The operation came one day after Air Force Brig. Gen. Don Alston called the Syrian border the "worst problem" in stemming the influx of foreign fighters to Iraq. Syria is under intense pressure from...