U.S. Army civilian Robert Powell, Technology Development Directorate UH-60 Black Hawk crew chief, conducts pre-flight operations prior to an orientation flight at Joint Base Langley-Eustis, Virginia, Oct. 6, 2020. The TDD’s mission is to efficiently and effectively deliver aviation and missile science & technology products and life cycle support services, which enhance the Army’s lethality. (U.S. Air Force photo by Staff Sgt. Joshua Magbanua)