Marc Buie of the Southwest Research Institute (SwRI), Bounder, CO discusses the process of finding MU69 Ultima Thule, Monday, Dec. 31, 2018 at Johns Hopkins University Applied Physics Laboratory (APL) in Laurel, Maryland. Photo Credit: (NASA/Bill Ingalls)

Installation of 1D2D-X probe in the IRT. Probe supplied by Science Engineering Associates (SEA). SFD (Subsonic Flight Demonstrator) of SLD (Supercooled Large Drop Instrumentation Test - Particle Size Measurements. Particle Size Distribution Entry, June 8-11, 2026 Large Drop Testing in IRT