Travis tankers refuel Nightwatch
Senior Airman Cody Grauel, 595th Aircraft Maintenance Squadron propulsion journeyman, inspects the engine of an E-4B for any damage or leaks after arriving to Travis Air Force Base, Calif., June 9, 2017. The E-4B, from U.S. Air Force Global Strike Command, Barksdale Air Force Base, La., provides support to the Federal Emergency Management Agency, which provides communications and command center capability to relief efforts following natural disasters, such as hurricanes and earthquakes. (U.S. Air Force photo/Staff Sgt. Nicole Leidholm/Released)

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Photo by: Staff Sgt. Nicole Leidholm |  VIRIN: 170612-F-BH656-048.JPG