Troops Push Security Door to Door in Iraq

BAGHDAD — Sweating through their uniforms, Capt. Ed Matthaidess and his men hunted through the heart of this Shiite neighborhood. In 120-degree heat, they spent six hours searching drawers and sewers alike. By the end of the day, their afternoon search had yielded slim pickings: four AK-47s and a tiny green water pistol.While Matthaidess and his Charlie Company were searching Shula in northwest Baghdad this week, other troops built concrete walls around a Sunni neighborhood to the south. Both actions were part of a stepped-up effort by 12,000 U.S. and Iraqi troops to stem sectarian bloodshed in the capital.