Hurlburt Field preps for Total Force Exercise 17-3
An Air Commando with the 901st Special Operations Maintenance Squadron, repairs a malfunctioning bleed regulator valve on an MC-130H Combat Talon II at Hurlburt Field, Fla., July 7, 2017. The aircraft's bleed regulator valve can get stuck open, reducing pressure and robbing the engine of the power necessary to perform in some emergency situations. (U.S. Air Force photo by Tech. Sgt. Jeffrey Curtin)

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Photo by: Tech. Sgt. Jeffrey Curtin |  VIRIN: 170707-F-CG447-0165.JPG