Lt. Col Candy Wilson, 779th Medical Group nurse practitioner, increases the electrical stimulation voltage of a Calmare pain therapy medical device while treating a patient using Nerve Scrambler Therapy May 30, 2017, at Joint Base Andrews, Md. The patients’ treatments vary from 20-60 minutes per session. (U.S. Air Force photo by Staff Sgt. Joe Yanik. This photo has been modified to protect PII)