Senior Airman Kaitlyn Callahan, 341st Medical Operations Squadron physical therapy technician, simulates a hip mobilization exercise Nov. 8, 2016, at Malmstrom Air Force Base, Mont. Callahan’s day-to-day duty is to complete exercises with patients, focusing on helping them gain mobility to speed up the recovery process. (U.S. Air Force photo/Airman 1st Class Daniel Brosam)