Soldiers from the 1-151 Attack Reconnaissance Battalion, South Carolina Army National Guard, perform preventative maintenance on a Army AH-64D Apache by washing the aircraft’s turbines engines at McEntire Joint National Guard Base on July 12, 2014. A sprayer-nozzle attached to the gas turbine engine injects hot soapy water into the engines to remove debris and carbon build-up. ( Army National Guard photo by Brian Calhoun/Released)

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Size: 1291px × 1936px
Photo credit: © Military PCF / Alamy / Afripics
License: Licensed
Model Released: No

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