U.S. Air Force Maj. Erin Burris, 355th Medical Operations Squadron pediatric physician, examines a patient at the 355th Medical Group at Davis-Monthan Air Force Base, Ariz., June 26, 2013. The 355th MDOS ensures combatant commanders that their warfighters are medically fit-to-fight and provides combat-ready medical personnel to execute medical support of missions worldwide. (U.S. Air Force photo by Senior Airman Christine Griffiths/Released)