SCHOOL CONSTRUCTION U.S. Army soldiers stabilize rafters during construction of a school in La Calera, Nicaragua, March 23, 2007. The soldiers, from the 153rd Engineer Battalion, South Dakota Army National Guard, and deployed with the U.S. Air Force's 820th Expeditionary Red Horse Squadron, are participating in New Horizons-Nicaragua 2007, a joint humanitarian and training exercise with the Nicaraguan military. SHARE: Download: Full Size (0.04 MB) Credit: VIRIN: 416418-P-GFM59-054.jpg Photo Gallery