U.S. Air Force Col. John Fisher smiles before entering the operating room to provide surgery to a Peruvian woman as part of New Horizons urology-gynecology surgical support activities in Chincha province, Peru, July 19, 2012. 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. (U.S. Air Force photo by Staff Sgt. Michael C. Zimmerman/Released)