Staff Sgt. Eric Siebert, 90th Maintenance Operations Squadron data analyst, rides an exercise bike as part of his physical therapy while answering related questions from Airman 1st Class Felicia Grassel, 90th Medical Operations Squadron physical therapy technician, in the Freedom Hall Fitness Center June 25, 2014. Siebert is recovering from knee surgery. (U.S. Air Force photo by Airman 1st Class Jason Wiese)
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