Two soldiers from Alaska were among four killed in Iraq on Monday when a roadside bomb exploded near their Humvee, the U.S. Department of Defense said today. Staff Sgt. Carletta S. Davis, 34, of Anchorage and Sgt. Derek T. Stenroos, 24, of North Pole were serving with a unit from Fort Drum, N.Y., post spokesmen said in a written statement. They died during combat operations in Tal Al-Dahab, Iraq. Davis was assigned to the 10th Brigade Support Battalion, 1st Brigade Combat Team, 10th Mountain Division (Light Infantry). Stenroos was assigned to the 1st Brigade Special Troops Battalion, 1st Brigade Combat...