Tech. Sgt. Chard Parnell, crater chief, uses a compact track loader to help fill a crater with concrete rocks – the stone-and-grout technology method – during the third day of repair of the expedient and expeditionary airfield damage repair demonstration at the Silver Flag Testing Facility on Tyndall Air Force Base, Fla., 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. (U.S. Air Force photo by David Ford)
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