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Capt. Ezekiel "E.Z." Duran, a physiologist with the 380th Expeditionary Medical Group, discusses a sleep cycle with Staff Sgt. Randall Kinchen, 380 EMDG unit deployment manager, at an undisclosed location in Southwest Asia, Jan. 1, 2014. Duran’s duties as a physiologist include improving warfighter performance and safety by increasing awareness and understanding of human factor challenges while mitigating or eliminating human errors and mishaps. (U.S. Air Force photo by Staff Sgt. Michael Means/Released)
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