Capt. Patricia Cassidy, 28th Medical Operations Squadron physical therapy officer in charge, watches as Capt. Chad Nishizuka, 34th Bomb Squadron chief of weapons and tactics, performs push-ups and arm walks during a physical therapy appointment at Ellsworth Air Force Base, S.D., Oct. 2, 2013. In an effort to reduce recovery time and pain during therapy, Cassidy works with her patients to ensure they are performing exercises safely and correctly. (U.S. Air Force photo by Airman 1st Class Alystria Maurer/Released)