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Tyler McCamey, left, an AEDC program manager, observes a gauge on gas-insulated switchgear (GIS) for the Propulsion Wind Tunnel (PWT) Facility, Feb. 14, 2020, at Arnold Air Force Base, Tenn. The switchgear was upgraded to GIS as a Service Life Extension Program effort. Also pictured, Nathan Harrison, former Service Life Extension Program manager for the Capital Improvements Branch. (U.S. Air Force photo by Jill Pickett)
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