Dr. Liangxiao Ma, right, traditional Chinese medicine professor of obstetrics and gynecology at Beijing University of Chinese Medicine, demonstrates and discusses acupuncture techniques with Lt. Col. Greg Sweitzer, Pacific Air Forces Clinical Quality and Innovation chief at a visit to her private clinic in Beijing, China, on Oct. 25, 2012. At the invitation of China's People Liberation Army, U.S. Air Force medical physicians, alongside their Chinese military and civilian counterparts, conducted the first-ever Medical Acupuncture Subject Matter Expert Exchange in Beijing, on Oct. 21-27, 2012. (U.S. Air Force courtesy photo)