Staff Sgt. Jennifer Yoon holds the daughter of an El Salvadoran mother who took her three children to see a pediatrician for a check-up. Sergeant Yoon, a medical technician from the 349th Aerospace Medicine Squadron, Travis Air Force Base, and other Air Force reservists deployed to El Salvador March 4 on a two-week humanitarian mission. (U.S. Air Force photo by Tech. Sgt. Wendy Weidenhamer)