U.S. Air Force Staff Sgt. Thomas Wright, 633rd Surgical Operations Squadron diagnostics medical sonographer, performs an ultrasound on Sara Cearnel, 633rd SGCS diagnostics medical sonographer, at Langley Air Force Base, Va., Nov. 14, 2014. Ultrasounds use high-frequency sound waves to look at organs and structures inside the body. (U.S. Air Force photo by Airman 1st Class Areca T. Wilson/Released)