MOSUL, Iraq - For a while, Capt. A.J. Newtson considered removing the slat armor cages from his company's Stryker infantry carriers. The big steel cages make it tough to maneuver the vehicles through some of Mosul's narrow streets. Then two of his trucks got hit by rocket-propelled grenades. "We're going to keep it," said Newtson, commander of the 2nd Battalion, 3rd Infantry Regiment's Charger Company. The cages, so far, are working as advertised. Strykers have come through four RPG hits with no major damage. One soldier was injured - a small shrapnel cut on his face. Soldiers on board say...