Exclusive: U.S. preparing to send more troops to Middle East - sources

The United States is preparing to send additional troops to the Middle East in response to mounting concerns over Iran, which Washington blames for attacks on oil tankers last week, two U.S. officials told Reuters on Monday, speaking on condition of anonymity.The officials did not say how many troops would be deployed or detail the timing of the deployment, which has not been previously reported.If confirmed, it would be in addition to the 1,500 troop increase announced last month in response to