A crew works atop exhaust cooler 1 of the Aeropropulsion Systems Test Facility at Arnold Air Force Base, Tenn., Sept. 14, 2021. A section of the ducting was cut away to allow heat exchangers to be installed in the cooler, as part of the Next Generation Turbine Engine Test Capability project. A hatch will be installed to allow access for future maintenance. ( Air Force photo by Jill Pickett)

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Photo credit: © APFootage / Alamy / Afripics
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Keywords: aeropropulsion, capability, engine, facility, gen, program, systems, test, turbine