JOINT BASE ELMENDORF-RICHARDSON, Alaska - Staff Sgt. Stanley Manning, 3rd Medical Group Sleep Lab technician, marks spots on the head of Jason Manzel, 725th Brigade Support Battalion, with a grease marker here March 31. The markings will allow Manning to know where to place electrodes used to read brain waves while a person sleeps. (U.S. Air Force photo/Airman 1st Class Jack Sanders)