MIRA VALLE LA PAZ, Honduras - U.S. Marine Corps Lance Cpl. Casey Ruff puts the finishing touches on a sidewalk after running a water line to a school here from a water tower across the street. The lance corporal is assigned to Alpha Company, 4th Combat Engineering Battalion in Crosslands, W.V. He is here for three weeks with Beyond the Horizon, a large-scale exercise completing medical readiness missions and civil engineer projects throughout Central America. (U.S. Air Force photo/ Tech. Sgt. Rebecca Danét)

MIRA VALLE LA PAZ, Honduras - Students at Escuela Aspiracion del Valle take their lessons in near darkness because there are no lights in their classrooms. U.S. Marine Corps civil engineers brought running water to the schoo for the first time June 16. Crews ran water lines from a tower accross the street to the school's kitchen, bathrooms and to a drinking fountain as part of Beyond the Horizon. BTH is a large-scale exercise taking place throughout Central America in which U.S. servicemembers complete civil engineer projects and medical readiness exercises. (U.S. Air Force photo/Tech. Sgt. Rebecca Danét)