Tech. Sgt. Chard Parnell, who served as crater chief throughout the event, uses a compact track loader to help fill a crater with concrete rocks – the stone and grout technology method – during Day 3 of repair of the Expedient and Expeditionary Airfield Damage Repair demo at the Tyndall Air Force Base Silver Flag Testing Facility in December 2020. The demo was the first of several planned events as part of a Joint Capability Technology Demonstration to bring together airfield damage recovery teams from the U.S. Navy, U.S. Army Corps of Engineers and Air Force to demonstrate E-ADR advancements. (Air Force photo by David Ford)
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