An infrared light illuminates Army Sgt. 1st Class Bobby M. Scharton, a platoon sergeant with 17th Fires Brigade, 7th Infantry Division, during a sleep study at Madigan Army Medical Center, Joint Base Lewis-McChord, Wash., Nov. 22, 2013. Physicians use data from the studies to diagnose severe sleep disorders like sleep apnea and insomnia. Inside a Madigan sleep study 131122-A-BB790-498

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