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Fatigue could result in extreme sleepiness and loss of situational awareness, which may impact all levels of mission readiness, Aug. 14, 2012, Langley Air Force Base, Va. (U.S. Air Force photo by Staff Sgt. Krystie Martinez/Released)

PHOTO BY: Staff Sgt. Krystie MartinezReleased
VIRIN: 120814-F-WK680-001.JPG
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