From left, Wayne Ringelberg, chief pilot at NASA’s Armstrong Flight Research Center in Edwards, California, is welcomed by Michael Thomson, director of NASA Armstrong’s Science Mission Directorate, and Kirsten Boogaard, NASA’s DC-8 project manager, after the DC-8 aircraft and crew return to NASA Armstrong’s Building 703 in Palmdale, California, on April 1, 2024, following the aircraft’s final mission in support of the Airborne and Satellite Investigation of Asian Air Quality (ASIA-AQ).