Airmen from an Air Force Expeditionary Medical Support team along with members of the Chilean army prepare a tarp that will be used as a roof for a mobile hospital March 12, 2010, in Angol, Chile. The EMEDS team is adding an additional operating room and three patient wards to the facility at the request of local Chilean medical officials. (U.S. Air Force photo/Senior Airman Tiffany Trojca)