Chilean soldiers help U.S. airmen from an expeditionary medical support team pull the roof over a mobile hospital in Angol, Chile, on March 12, 2010. The expeditionary medical support team is adding an additional operating room and three patient wards to the facility at the request of local Chilean medical officials. The U.S. Air Force is assisting in the area in the wake of an 8.8-magnitude earthquake that struck the country on Feb. 27, 2010.