Maj. Zachary Garrett, a 49th Medical Group aerospace and operational physiologist, briefs personnel about the stress and sleep hygiene during Top Knife, Feb. 9, 2017 at Holloman Air Force Base, During Top Knife, flight surgeons, physiologists, psychologists and chaplains from across the Air Force came to Holloman and were taught about the current challenges facing RPA personnel. ( Air Force photo by Senior Airman Emily Kenney)

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