U.S. Air Force Airman 1st Class Mazel Sievers, a structural worker with the 823rd Rapid Engineer Deployable Heavy Operational Repair Squadron Engineers, pulls a chalk line to mark the ends of rafters during the construction of a building at Ladyville Technical High School May 13, 2013, in Ladyville, Belize, as part of exercise New Horizons 2013.
New Horizons is a U.S. Southern Command-sponsored annual series of joint humanitarian assistance exercises deploying U.S. military engineers, veterinarians, medics and other professions to Central and South American nations for training, construction projects and to provide humanitarian and medical services. (DoD photo by Capt. Holly Hess, U.S. Air Force/Released). Original public domain image from Flickr