U.S. Air Force Senior Airman Amanda Beard (center), 59th Orthopedics and Rehabilitation Squadron physical medicine technician, instructs U.S. Army Pvt. Milagros Estopinan (left) and Cpl. Edmy Rodriguez, students from the Defense Language Institute, to do a series of water therapy aerobics during a physical therapy session, Sept. 21, 2009, Wilford Hall Medical Center, Lackland Air Force Base, Texas.