Ryan Strange, a research physical scientist with the U.S. Army Corps of Engineers’ Aviation and Remote Systems Program and Huntsville Center’s Unmanned Aircraft Systems Site Development Branch, assembles the senseFly eBee X fixed-wing unmanned aircraft system outside the U.S. Army Engineering and Support Center, Huntsville, Alabama, Oct. 1, 2019, in preparation for flight. At left is Bethanie Thomas, a civil engineer with Huntsville Center’s Unmanned Aircraft Systems Site Development Branch, who is double-checking programmed flight-plan characteristics before takeoff, such as altitude, ground speed, mission waypoints and flight time.