Four American soldiers were abducted during a sophisticated sneak attack last week in the Shiite holy city of Karbala, the U.S. military confirmed Friday. It said three were shot to death and a fourth was mortally wounded with a gunshot to the head when they were found in a neighboring province, far from the compound where they were captured. Two of the four were handcuffed together in the back seat of an SUV near the southern Iraqi town of Mahawil. A third dead soldier was on the ground nearby. The fourth soldier died on the way to the hospital, the...