Airman 1st Class Felicia Grassel, 90th Medical Operations Squadron physical therapy technician, explains the proper way to perform a physical therapy exercise to Tech. Sgt. Markeus Lee, 90th Maintenance Operations Squadron Facility Maintenance Training Section NCO-in-charge, June 25, 2014, in the Freedom Hall Fitness Center. (U.S. Air Force photo by Airman 1st Class Jason Wiese)